(2X+3)(2X-3)-(3X+1)(X-3)的计算步骤及答案
问题描述:
(2X+3)(2X-3)-(3X+1)(X-3)的计算步骤及答案
答
(2X+3)(2X-3)-(3X+1)(X-3)
=4x^2-9-(3x^2-9x+x-3)
=x^2+8x-6