(2x+300)(x-4)-2(x+2)(x-3)
问题描述：
(2x+300)(x-4)-2(x+2)(x-3)
答
原式=(2x²-8x+300x-1200)-2(x²-x-6)
=2x²+292x-1200-2x²+2x+12
=294x-1188