(x+2)(x-2)+x(3-x)化简
问题描述:
(x+2)(x-2)+x(3-x)化简
答
(x+2)(x-2)+x(3-x)
=x²-4+3x-x²
=3x-4
(x+2)(x-2)+x(3-x)化简
(x+2)(x-2)+x(3-x)
=x²-4+3x-x²
=3x-4