4x的三次方y*(-xy的平方)的三次方-搜答案-大师作文网

原式=2xy(x²+2xy+y²)=2xy(x+y)²=2*2*4²=64

原式=4x²y³÷(-1/2xy)²=4x²y³÷[(-1/2)²x²y²]=4x²y³÷[(1/4

(-2/3x³y+4x²y²-1/2xy³)/(-xy/4)=-2/3x³y/(-xy/4)+4x²y²/(-xy/4)-1/2x

4x的三次方y+4x的平方y的平方+xy的三次方=xy（4x^2+4xy+y^2）=xy(2x+y)^2肯定对望采纳

4x³-4x²y+xy²=x(4x²-4xy+y²)=x(2x-y)²(x²+9)²-36x²=(x²

x³+x²y+xy²+y³=x²(x+y)+y²(x+y)=(x+y)(x²+y²)

(－5xy)²·(-xy)³+(4x²y-3x)(-x³·y^4)+x^5·y^5=25x²y²·（-x³y³）-4x^

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4xy的平方-4x的平方y-y的三次方=y(4xy-4x^2-y^2)=-y(4x^2-4xy+y^2)=-y(2x-y)^2

-4x的7次方y的16次方2-3/2x的9次方y的9次方1.58×10的9次方

-4x的平方+16x=-4x(x-4)-4x的三次方y+16x的二次方=-4x²（xy-4）y的二次方-16xy的三次方=y²（1-16xy）提示：因式分解,运用提公因式法

x²y³-2x(4xy³)=x²y³-2x²y³=-x²y³

=xy(4x²+4xy+y²)=xy(2x+y)²

原式等于(xy)^2(x+y)将x+y=2,xy=4代入,得原式等于16×2=32

xy(x+y)²-4x³y³=xy[(x+y)²-4x²y²]=xy(x+y+2xy)(x+y-2xy)

(x-y)^4=x^4+y^4+6x^2y^2-4x^3y-4y^3xx^4-2x^2y^2-4xy^3+4x^3+y^2（4x^2+3/4y^2)=1/4[(4x^4+4y^4+24x^2y^2-1

-4xy的平方+4x的平方y+y的三次方=y(4x²-4xy＋y²)=y(2x-y)²

原式=-x³y^6+x²y^4+xy²=-(xy²)³+(xy²)²+(xy²)=-2³+2²+2=

x³-y³-x²y+xy²=(x³-y³)-(x²y-xy²)=(x-y)(x²+xy+y²)-xy