(x +y)的三次方×(2x+2y)的二次方×(3x+3y)的二次方
问题描述:
(x +y)的三次方×(2x+2y)的二次方×(3x+3y)的二次方
答
解
(x+y)³×(2x+2y)²×(3x+3y)²
=(x+y)³×4(x+y)²×9(x+y)²
=36(x+y)^(3+2+2)
=36(x+y)^7