(3x-1)(2x+3)-(x-2)(6x-5),其中x=-8分之3,先化简,在求值
问题描述:
(3x-1)(2x+3)-(x-2)(6x-5),其中x=-8分之3,先化简,在求值
答
(3x-1)(2x+3)-(x-2)(6x-5)
=6x^2+7x-3-6x^2+17x-10
=24x-13
=-9-13
=-22