(X-2)(X²+2X)—(X+2)(X²-2X)计算题

问题描述:

(X-2)(X²+2X)—(X+2)(X²-2X)计算题

0
1.提第二个里的x
你就明白了!
(x-2)(x+2)x-(x+2)(x-2)x=0