已知x-y=-1/3,则x方-2xy+y方的值为
问题描述:
已知x-y=-1/3,则x方-2xy+y方的值为
答
x³-2xy+y²=(x-y)²
=(-1/3)²
=1/9
已知x-y=-1/3,则x方-2xy+y方的值为
x³-2xy+y²=(x-y)²
=(-1/3)²
=1/9