数学计算题,要过程
3个回答
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(1)
(25x²y³z-10x³y²)÷(5x²y)×y
=5x²y²(5yz-2x)÷5x²y²
=5yz-2x
(2)
(3x²y-xy²+xy/2)÷(-xy/2)
=xy(3x-y+1/2)÷(-xy/2)
=-2(3x-y+1/2)
=2(y-3x)-1
(3)
(12x^4y^3-16x^3y^4-4x^2y^2)÷(-4x^2y^2)
=4x^2y^2(3x^2y-4xy^2-1)÷(-4x^2y^2)
=-(3x^2y-4xy^2-1)
=xy(y-3x)+1
(4)
[x(-4x+3)+(x+2)(x-2)x]÷(-x)
=x[(-4x+3)+(x²-4)]÷(-x)
=-(x²-4x-1)
(25x²y³z-10x³y²)÷(5x²y)×y
=5x²y²(5yz-2x)÷5x²y²
=5yz-2x
(2)
(3x²y-xy²+xy/2)÷(-xy/2)
=xy(3x-y+1/2)÷(-xy/2)
=-2(3x-y+1/2)
=2(y-3x)-1
(3)
(12x^4y^3-16x^3y^4-4x^2y^2)÷(-4x^2y^2)
=4x^2y^2(3x^2y-4xy^2-1)÷(-4x^2y^2)
=-(3x^2y-4xy^2-1)
=xy(y-3x)+1
(4)
[x(-4x+3)+(x+2)(x-2)x]÷(-x)
=x[(-4x+3)+(x²-4)]÷(-x)
=-(x²-4x-1)
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