来自董芳艳的问题
【1.(b²+2a²)(2a²-b²)2.(4x²-4y²)(x²+y²)3.—(x-1)(x+1)-3(x+2)(x-2)4.(5y²+4x²)[4y²+(2x-y)(-2x-y)]】
1.(b²+2a²)(2a²-b²)2.(4x²-4y²)(x²+y²)
3.—(x-1)(x+1)-3(x+2)(x-2)4.(5y²+4x²)[4y²+(2x-y)(-2x-y)]
1回答
2020-05-15 00:37