问题补充:
x的5次方乘以(-2y)的三次方+(-2xy)的二次方乘以x的3次方y
答案:
X5*(-2Y)3+(-2xy)2*x3y
=x5*(-8y3)+(4x2y2)*x3y
=-8x5y3+4x5y3
=-4x5y3
时间:2021-11-09 14:35:27
x的5次方乘以(-2y)的三次方+(-2xy)的二次方乘以x的3次方y
X5*(-2Y)3+(-2xy)2*x3y
=x5*(-8y3)+(4x2y2)*x3y
=-8x5y3+4x5y3
=-4x5y3
已知x的二次方=(-2)的二次方 y的三次方=-1 求xy的次方2的次方是多少?
2020-08-27