Làm tính chia :
a) \(\left(-2x^5+3x^2-4x^3\right):2x^2\)
b) \(\left(x^3-2x^2y+3xy^2\right):\left(-\dfrac{1}{2}x\right)\)
c) \(\left(3x^2y^2+6x^2y^3-12xy\right):3xy\)
Những câu hỏi liên quan
thực hiện phép tính:
a,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
b,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
c,\(\left(x^2-xy\right):x-+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
thực hiện phép tính:
a,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
b,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
c,\(\left(x^2-xy\right):x-+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
a: \(=3y^2-5x^2y^3-2y^2+3x^2y^3=y^2-2x^2y^3\)
b: \(=6x-y+2x^2+3y^2-2x^2+x=7x-y+3y^2\)
c: \(=x-y+4y^2-6xy+\dfrac{10x^2}{y}\)
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thực hiện phép tính:
a,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
b,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
c,\(\left(x^2-xy\right):x-+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
\(a.\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
\(=3y^2-5x^2y^3-2y^2+3x^2y^3\)
\(=y^2-2x^2y^3\)
\(b.\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
\(=6x-y+2x^2+3y-2+x\)
\(=2x^2+7x+2y-2\)
\(c.\left(x^2-xy\right):x+\left(6x^2y^5-9x^3y^4+15x^4y^3\right):\dfrac{3}{2}x^2y^3\)
\(=x-y+4y^2-6xy+10x^2\)
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thực hiện phép tính;
a,\(\dfrac{\left(3a^2b\right)^3\left(ab^3\right)^2}{\left(a^2b^2\right)^4}\)
b,\(\left(9x^2y^3-15x^4y^4\right):3x^2y-\left(2-3x^2y\right)y^2\)
c,\(\left(6x^2-xy\right):x+\left(2x^3y+3xy^2\right):xy-\left(2x-1\right)x\)
d,\(\left(x^2-xy\right):x+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
a: \(=\dfrac{27a^6b^3\cdot a^2b^6}{a^8b^8}=27b\)
b: \(=3y^2-5x^2y^3-2y^2+3x^2y^3\)
\(=y^2-2x^2y^3\)
c: \(=6x-y+2x^2+3y-2x^2+x\)
\(=7x+2y\)
d: \(=x-y+2y^2-6xy+\dfrac{10x^2}{y}\)
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Thực hiện phép tính các đa thức sau
a) left(3x^2-2x+5right)left(2x^2-3x+1right)
b) left(dfrac{3}{2}x^2-dfrac{2}{3}x-dfrac{5}{3}right)left(4x^2-dfrac{3}{2}x-3right)
c) left(dfrac{3}{4}x^2+2x-dfrac{1}{3}right)left(4x^2-dfrac{3}{2}x-3right)
d) left(-dfrac{1}{3}+2x-x^2right)left(-2x^2-dfrac{1}{2}x+2right)
e) left(3xy+dfrac{1}{2}xright)left(3x^{2y}-3xy^2-1right)
Đọc tiếp
Thực hiện phép tính các đa thức sau
a) \(\left(3x^2-2x+5\right)\left(2x^2-3x+1\right)\)
b) \(\left(\dfrac{3}{2}x^2-\dfrac{2}{3}x-\dfrac{5}{3}\right)\left(4x^2-\dfrac{3}{2}x-3\right)\)
c) \(\left(\dfrac{3}{4}x^2+2x-\dfrac{1}{3}\right)\left(4x^2-\dfrac{3}{2}x-3\right)\)
d) \(\left(-\dfrac{1}{3}+2x-x^2\right)\left(-2x^2-\dfrac{1}{2}x+2\right)\)
e) \(\left(3xy+\dfrac{1}{2}x\right)\left(3x^{2y}-3xy^2-1\right)\)
a: \(=6x^4-9x^3+3x^2-4x^3+6x^2-2x+10x^2-15x+5\)
\(=6x^4-13x^3+19x^2-17x+5\)
b: \(=6x^4-\dfrac{9}{4}x^3-\dfrac{9}{2}x^2-\dfrac{8}{3}x^3+x^2+2x-\dfrac{20}{3}x^2+\dfrac{5}{2}x+5\)
\(=6x^4-\dfrac{59}{12}x^3-\dfrac{67}{6}x^2+\dfrac{9}{2}x+5\)
c: \(=3x^4-\dfrac{9}{8}x^3-\dfrac{3}{4}x^2+8x^3-3x^2-6x-\dfrac{4}{3}x^2+\dfrac{1}{2}x+1\)
\(=3x^4-\dfrac{55}{8}x^3-\dfrac{25}{12}x^2-\dfrac{11}{2}x+1\)
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Quy đồng mẫu thức các phân thức sau :
a) dfrac{25}{14x^2y};dfrac{14}{21xy^5}
b) dfrac{11}{102x^4y};dfrac{3}{34xy^3}
c) dfrac{3x+1}{12xy^4};dfrac{y-2}{9x^2y^3}
d) dfrac{1}{6x^3y^2};dfrac{x+1}{9x^2y^4};dfrac{x-1}{4xy^3}
e) dfrac{3+2x}{10x^4y};dfrac{5}{8x^2y^2};dfrac{2}{3xy^5}
f) dfrac{4x-4}{2xleft(x+3right)};dfrac{x-3}{3xleft(x+1right)}
g) dfrac{2x}{left(x+2right)^3};dfrac{x-2}{2xleft(x+2right)^2}
h) dfrac{5}{3x^3-12x};dfrac{3}{left(2x+4right)left(x+3right)}
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Quy đồng mẫu thức các phân thức sau :
a) \(\dfrac{25}{14x^2y};\dfrac{14}{21xy^5}\)
b) \(\dfrac{11}{102x^4y};\dfrac{3}{34xy^3}\)
c) \(\dfrac{3x+1}{12xy^4};\dfrac{y-2}{9x^2y^3}\)
d) \(\dfrac{1}{6x^3y^2};\dfrac{x+1}{9x^2y^4};\dfrac{x-1}{4xy^3}\)
e) \(\dfrac{3+2x}{10x^4y};\dfrac{5}{8x^2y^2};\dfrac{2}{3xy^5}\)
f) \(\dfrac{4x-4}{2x\left(x+3\right)};\dfrac{x-3}{3x\left(x+1\right)}\)
g) \(\dfrac{2x}{\left(x+2\right)^3};\dfrac{x-2}{2x\left(x+2\right)^2}\)
h) \(\dfrac{5}{3x^3-12x};\dfrac{3}{\left(2x+4\right)\left(x+3\right)}\)
1. Thực hiện phép tínha) left(3x^2y-6xy+9xright).left(frac{-4}{3xy}right)b) left(frac{1}{3}x+2yright).left(frac{1}{9}x^2-frac{2}{3}xy+4y^2right)c) (x-2) ( x^2-5x+1) + x ( x^2+11)d) (x - 3y ) left(x^2+3xy+9y^2right)e) left(3+xright)left(x^2+3x-5right)f) (x+2)(x-2)-(2x+1)2. Rút gọn biểu thứca ) left(3x+2right)^2+2left(2+3xright)left(1-2yright)+left(2y-1right)^2b ) left(3x+1right)^2-2left(3x+1right)left(3x+5right)+left(3x+5right)^2c) 2xleft(2x-1right)^2-3xleft(x+3right)left(x-3right)-4xleft(x+1righ...
Đọc tiếp
1. Thực hiện phép tính
a) \(\left(3x^2y-6xy+9x\right).\left(\frac{-4}{3xy}\right)\)
b) \(\left(\frac{1}{3}x+2y\right).\left(\frac{1}{9}x^2-\frac{2}{3}xy+4y^2\right)\)
c) (x-2) ( \(x^2-5x+1\)) + x ( \(x^2+11\))
d) (x - 3y ) \(\left(x^2+3xy+9y^2\right)\)
e) \(\left(3+x\right)\left(x^2+3x-5\right)\)
f) (x+2)(x-2)-(2x+1)
2. Rút gọn biểu thức
a ) \(\left(3x+2\right)^2+2\left(2+3x\right)\left(1-2y\right)+\left(2y-1\right)^2\)
b ) \(\left(3x+1\right)^2-2\left(3x+1\right)\left(3x+5\right)+\left(3x+5\right)^2\)
c) \(2x\left(2x-1\right)^2-3x\left(x+3\right)\left(x-3\right)-4x\left(x+1\right)^2\)
cau a : (3x^2y-6xy+9x)(-4/3xy)
=-4/3xy.3x^2y+4/3xy.6xy-4/3xy.9x
=-4x+8-8y
cau b : (1/3x+2y)(1/9x^2-2/3xy+4y^2)
=(1/3)^3-2/9x^2y+8y^3+4/3xy^2+2/9x^2y-4/3xy^2+8y^3
=(1/3)^3 + (2y)^3x-2
cau c : (x-2)(x^2-5x+1)+x(x^2+11)
=x^3-5x^2+x-2x^2+10x-2+x^3+11x
=2x^3-7x^2+22x-2
cau d := x^3 + 6xy^2 -27y^3
cau e := x^3 + 3x^2 -5x - 3x^2y - 9xy = 15y
cau f := x^2-2x+2x -4-2x-1
= x(x-2)-5
cau e la + 15y ko phai =15y
Bài 1: Thực hiện phép tính:
\(x^2y.\left(-3xy^2-3y+2\right)\\ \left(3x-1\right).\left(2x+4\right)\\ 2x^2y.\left(3xy^2+5y-1\right)\\ \left(x-1\right).\left(2x-3\right)\)
a: \(=-3x^3y^3-3x^2y^2+2x^2y\)
b: \(=6x^2+12x-2x-4\)
\(=6x^2+10x-4\)
c: \(=6x^3y^3+10x^2y^2-2x^2y\)
d: \(=2x^2-3x-2x+3\)
\(=2x^2-5x+3\)
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thực hiện phép tính:
a,\(\left(2x^3-x^2+5x\right):x\)
b,\(\left(3x^4-2x^3+x^2\right):\left(-2x\right)\)
c,\(\left(-2x^5+3x^2-4x^3\right):2x^2\)
d,\(\left(x^3-2x^2y+3xy^2\right):\left(\dfrac{-1}{2}x\right)\)
e,\(\left(3\left(x-y\right)^5-2\left(x-y\right)^4+3\left(x-y\right)^2\right):5\left(x-y\right)^2\)
a: \(=2x^2-x+5\)
b: \(=-\dfrac{3}{2}x^3+x^2-\dfrac{1}{2}x\)
c: \(=-x^3+\dfrac{3}{2}-2x\)
d: \(=-2x^2+4xy-6y^2\)
e: \(=\dfrac{3}{5}\left(x-y\right)^3-\dfrac{2}{5}\left(x-y\right)^2+\dfrac{3}{5}\)
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