Question

x(x-y)^3+2x^2(y-x)^2-2xy(x-y)^2其中x=0.5 y=2 过程详细点

Answer 1

=x(x-y)^3+2x(x-y)^2(x-y)
=x(x-y)^3+2x(x-y)^3
=3x(x-y)^3
将消吵x和州岩y代册桥御入得
3*0.5*(0.5-2)^3
=-1.5^4
=5.0625

Answer 2

你好！

原禅轿毕式= (x-y)² [x(x-y) +2x² - 2xy]
= (x-y)² [x² -xy + 2x² -2xy]
= (x-y)²贺芹 (3x² -3xy)
= 3x(x-y)³
= 3×0.5 × (0.5 -2)³帆银
= 1.5×(-1.5)³
= - 1.5⁴
= - (3/2)⁴
= - 81 / 16

Answer 3

x(x-y)^3+2x^2(y-x)^2-2xy(x-y)^2
=(x²-xy)(x-y)²+2x²(x-y)²-2xy(x-y)²宏启纯
=(x-y)²[x²-xy+2x²-2xy]
=(x-y)²[3x²-3xy]
=3x(x-y)³
=3*0.5*(0.5-2)³
=1.5*(-1.5)³
=-1.5^4
=-5.0625
望采纳蔽咐旁销

Answer 4

x(x-y)^3+2x^2(y-x)^2-2xy(x-y)^2
=x(x-y)^3+2x^2(x-y)^2-2xy(x-y)^2
=x(x-y)^2[(x-y)+2x-2y]
=x(x-y)^2(x-y+2x-2y)
=x(x-y)^2(3x-3y)
=3x(x-y)^3
=3*1/2*(1/庆誉2-2)^3
=3/2*(-3/2)^3
=-(3/2)^4
=-81/誉碧段慧者16