已知x-y=-6,xy=-8,求x3y-2x2y2+xy3的值
问题描述:
已知x-y=-6,xy=-8,求x3y-2x2y2+xy3的值
答
x3y-2x2y2+xy3
=xy(x2-2xy+y2)
=xy(x-y)^2
=-8*(-6)^2
=-8*36
=-288
答
原式= xy(x^2-2xy+y^2) = xy(x-y)^2 = (-8)*(-6)^2 =-288
答
x³y-2x²y²+xy³=xy(x²-2xy+y²)=xy(x-y)²=-8×(-6)²=-8×36=-288泪笑为您解答,请点击[采纳为满意回答];如若您有不满意之处,请指出,我一定改正!希望还您一个正确答复!祝您学业...