利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)(3a+2)^2-(2a-1)^2(x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2(a+3)(a-3)(a^2+9)

问题描述:

利用乘法公式计算 (3a+2)^2-(2a-1)^2 (x-y)(x+y)-(2x-y)^2 [(x+2)(x-2)]^2 (a+3)(a-3)(a^2+9)
(3a+2)^2-(2a-1)^2
(x-y)(x+y)-(2x-y)^2
[(x+2)(x-2)]^2
(a+3)(a-3)(a^2+9)