【直接写答案,做好给5分】整式的运算
(-2x+3)(-2x-3)
(-1/2x+2y)(-1/2x+2y)
-2(1/3x-3/2y)(1/3x-3/2y)
4(-3/2x-3y)(3/2x-3y)
(3mn+1/2)(3mn-1/2)-m²n²
x²-(x+2)(x-2)
(x+2y+3z)(x+2y-3z)
(x/2+5)²-(x/2-5)²
邮箱:联系方式: