Làm tính chia :
a) \(\left(25x^2-5x^4+10x^2\right):5x^2\)
b) \(\left(15x^3y^2-6x^2y-3x^2y^2\right):6x^2y\)
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28 tháng 10 2018 lúc 17:21
a) (25x^5 – 5x^4 + 10x^2) : 5x^2 ; b) (15x^3y^2- 6x^2y – 3x^2y^2) : 6x^2y
a) (25x^5 – 5x^4 + 10x^2) : 5x^2
= (25x^5 : 5x^2) – (5x^4 : 5x^2) + (10x^2 : 5x^2)
= 5x^3 – x^2 + 2
b) (15x^3y^2- 6x^2y – 3x^2y^2) : 6x^2y
= (15x^3y^2 : 6x^2y) + (-6x^2y : 6x^2y) + (- 3x^2y^2 : 6x^2y)
=\(\frac{15}{6}xy-1-\frac{3}{6}y\)
=\(\frac{5}{2}xy-1-\frac{1}{2}y\)
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Làm phép chia:
\(a,15x^3y^5z:5x^2y^3\)
\(b,12x^4y^2:\left(-9xy^2\right)\)
\(c,\left(30x^4y^3-25x^2y^3-3x^4y^4\right):5x^2y^3\)
\(d,\left(4x^4-8x^2y^2+12x^5y\right):\left(-4x^2\right)\)
a, 15x3y5z : 5x2y3 = 3xy2z.
b, 12x4y2 : ( - 9xy2 ) = \(\frac{3}{4}x^3\).
c, ( 30x4y3 - 25x2y3 - 3x4y4 ) : 5x2y3 = \(6x^2-5-\frac{3}{5}x^2y.\)
d, ( 4x4 - 8x2y2 + 12x5y ) : ( - 4x2 ) = -x2 + 2y2 - 3x3y.
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thức hiên phép nhân:
a)\(3x^2\left(2x^3-x+5\right)=6x^5-3x^3+15x^2\)
b)\(\left(4xy+3y-5x\right)x^2y=4x^3y^2+3x^2y^2-5x^3y\)
Làm tính chia:
a) \(5x^2y^4:10x^2y\)
b)\(\dfrac{3}{4}x^3y^3:\left(-\dfrac{1}{2}x^2y^2\right)\)
c)\(\left(-xy\right)^{10}:\left(-xy\right)^5\)
a: \(5x^2y^4:10x^2y=\dfrac{1}{2}y^3\)
c: \(\left(-xy\right)^{10}:\left(-xy\right)^5=-x^5y^5\)
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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,\(\left(x^2-xy\right):x-+\left(6x^2y^5-9x^3y^4+15x^4y^2\right):\dfrac{3}{2}x^2y^3\)
Làm phép chia:
\(a,15x^3y^5z:5x^2y^3\)
\(b,12x^4y^2:\left(-9xy^2\right)\)
\(c,\left(30x^4y^3-25x^2y^3-3x^4y^4\right):5x^2y^3\)
\(d,\left(4x^4-8x^2y^2+12x^5y\right):\left(-4x^2\right)\)
a: \(=\dfrac{15}{5}\cdot\dfrac{x^3}{x^2}\cdot\dfrac{y^5}{y^3}\cdot z=3xy^2z\)
b: \(=-\dfrac{4}{3}x^3\)
c: \(=\dfrac{30x^4y^3}{5x^2y^3}-\dfrac{25x^2y^3}{5x^2y^3}-\dfrac{3x^4y^4}{5x^2y^3}\)
\(=6x^2-5-\dfrac{3}{5}x^2y\)
d: \(=\dfrac{4x^4}{-4x^2}+\dfrac{8x^2y^2}{4x^2}-\dfrac{12x^5y}{4x^2}\)
\(=-x^2+2y^2-3x^3y\)
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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: \(=3y^2-5x^2y^3-2y^2+3x^2y^3=y^2-2x^2y^3\)
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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