y^5x(y^5)^2一2x(y^5)^3
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y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
y^5x(y^5)^2一2x(y^5)^3
原式=(y^5)^3-2*(y^5)^3
=-(y^5)^3
=-y^15
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
y^5x(y^5)^2一2x(y^5)^3
化简求值(x+5y)(x+4y)-(x-y)(x+y),其中x=一又2/5,y=-1/7
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2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
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多项式成多项式(一):(-4X-Y)(-5X+2Y)(二):(Y-1)(Y-2)(Y-3)(三):(2x+3y)(3x-2y)(四):(x+2)(x+3)-(x+6)(x-1)(五):(3x+2y)(2x+3y)-(x-3y)(3x+4y)
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一(y+x)一(5x一2y)=?
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(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
((x+2y)x^2+(x-y)(3x-y)-5y^2)÷2x
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2x^2y×(-8y^2)+4x^2y×5y^2