\(\left(2x+1\right)^2-\left(4x-3\right).\left(x+7\right)-22\)
\(=4x^2+4x+1-4x^2-28x+3x+21-22\)
\(=-21x\)
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Tìm x
a)\(\left(x-1\right)^3+\left(2x+3\right)^3=27x^3+8\)
b)\(\left(x+1\right)^2\left(x+2\right)+\left(x-1\right)^2\left(x-2\right)=12\)
Tính
a)\(2x\left(x^2-5x-1\right)+\left(3x-1\right)x\)
b)\(\left(2x^3yz-7x^2yz\right)\left(-5xyz\right)+\left(x^2y^2z+xy^2z\right)4x^2z\)
Thực hiện phép tính:a) dfrac{2}{5}xyleft(x^2y-5x+10yright)b) left(x^2-1right)left(x^2+2x+yright)c) left(x+3yright)^2d) left(4x-yright)^3e) left(x^2-2yright)left(x^2+2yright)g) 18x^4y^2z:10x^4yh) left(x^3y^3+dfrac{1}{2}x^2y^3-x^3y^2right):dfrac{1}{3}x^2y^2i) left(6x^3-7x^2-x+2right):left(2x+1right)k) dfrac{5x-1}{3x^2y}+dfrac{x+1}{3x^2y}l) dfrac{3x+1}{x^2-3x+1}+dfrac{x^2-6x}{x^2-3x+1}m) dfrac{2x+3}{10x-4}+dfrac{5-3x}{4-10x}n) dfrac{x}{x^2+2x+1}+dfrac{3}{5x^2-5}o) dfrac{x^2+2}{x^3-1}+dfrac{2}{x^2+x...
Đọc tiếp
Thực hiện phép tính:
a) \(\dfrac{2}{5}xy\left(x^2y-5x+10y\right)\)
b) \(\left(x^2-1\right)\left(x^2+2x+y\right)\)
c) \(\left(x+3y\right)^2\)
d) \(\left(4x-y\right)^3\)
e) \(\left(x^2-2y\right)\left(x^2+2y\right)\)
g) \(18x^4y^2z:10x^4y\)
h) \(\left(x^3y^3+\dfrac{1}{2}x^2y^3-x^3y^2\right):\dfrac{1}{3}x^2y^2\)
i) \(\left(6x^3-7x^2-x+2\right):\left(2x+1\right)\)
k) \(\dfrac{5x-1}{3x^2y}+\dfrac{x+1}{3x^2y}\)
l) \(\dfrac{3x+1}{x^2-3x+1}+\dfrac{x^2-6x}{x^2-3x+1}\)
m) \(\dfrac{2x+3}{10x-4}+\dfrac{5-3x}{4-10x}\)
n) \(\dfrac{x}{x^2+2x+1}+\dfrac{3}{5x^2-5}\)
o) \(\dfrac{x^2+2}{x^3-1}+\dfrac{2}{x^2+x+1}+\dfrac{1}{1-x}\)
p) \(\dfrac{4x+2}{15x^3y}\dfrac{5y-3}{9x^2y}+\dfrac{x+1}{5xy^3}\)
q) \(\dfrac{2x-7}{10x-4}-\dfrac{3x+5}{4-10x}\)
r) \(\dfrac{3}{2x+6}-\dfrac{x-6}{2x^2+6x}\)
x) \(\dfrac{4y^2}{11x^4}.\left(-\dfrac{3x^2}{8y}\right)\)
y) \(\dfrac{x^2-4}{3x+12}.\dfrac{x+4}{2x-4}\)
z) \(\left(x^2-25\right):\dfrac{2x+10}{3x-7}\)
t) \(\left(\dfrac{2x+1}{2x-1}-\dfrac{2x-1}{2x+1}\right):\dfrac{4x}{10x-5}\)
w) \(\left(\dfrac{1}{x^2+x}-\dfrac{2-x}{x+1}\right):\left(\dfrac{1}{x}+x-2\right)\)
thực hiện phép tính
a)\(2x\left(x^2-5x-1\right)+\left(3x-1\right)x\)
b)\(\left(2x^3yz-7x^2yz\right)\left(-5xyz\right)+\left(x^2y^2z+xy^2z\right)4x^2z\)
Tính
a. \(6x^2.\left(3x^2-4x+5\right)\)
b.\(\left(x-2y\right)\left(3xy+6y^2+x\right)\)
c.\(\left(18x^4y^3-24x^3y^4+12x^3y^3\right):\left(-6x^2y^3\right)\)
26 tháng 7 2019 lúc 14:24
\(\left(2x+4y\right)^2:\left(2x+4y\right)-\left(9x^3-12x^2-3x\right):\left(-3x\right)-3\cdot\left(x^2+3\right)\)
\(\left(13x^2y^2-5x^4+6y^4-13x^3y-13xy^3\right):\left(2y^2-x^2-3xy\right)\)
chia đa thức
Thực hiện phép tính
a, \(A=\left(3x^2y-11x^2-5y\right)\left(8xy-5x+6\right)\)
b,\(B=\left(-4x^2y-5x^2+3y^2\right)\left(2x^2-xy+3y^2\right)\)
c,\(C=5\left(2x-1\right)^2+4\left(x-1\right)\left(x+3\right)-2\left(3x-1\right)\left(3x+1\right)\)
8 tháng 7 2023 lúc 21:29
Rút gọn
a) \(\left(x+2y\right)^2+4y\)
b) \(\left(2x-3\right)\left(2x+3\right)-4x^2\)
c)\(\left(3x+1\right)^2-\left(x+1\right)\left(x-1\right)\)
Rút gọn các phân thức:
a)\(\dfrac{14xy^5\left(2x-3y\right)}{21x^2y\left(2x-3y\right)^2}\) b)\(\dfrac{8xy\left(3x-1\right)^3}{12x^3\left(1-3x\right)}\)
c) \(\dfrac{20x^2-45
}{\left(2x+3\right)^2}\) d) \(\dfrac{5x^2-10xy}{2\left(2y-x\right)^3}\)
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) \(2x\left(2x-1\right)^2-3x\left(x+3\right)\left(x-3\right)-4x\left(x+1\right)^2\)