化简:7y(x-3y)²-(3y-x)²
问题描述:
化简:7y(x-3y)²-(3y-x)²
答
=(7y-1)(x-3y)²
答
7y(x-3y)²-(3y-x)²=7y(x-3y)²-(x-3y)²=(7y-1)(x-3y)²
化简:7y(x-3y)²-(3y-x)²
=(7y-1)(x-3y)²
7y(x-3y)²-(3y-x)²=7y(x-3y)²-(x-3y)²=(7y-1)(x-3y)²