先化简,再求值:(3x-1)(2x+3)-(x-2(6x-5),其中x=-3/8

问题描述:

先化简,再求值:(3x-1)(2x+3)-(x-2(6x-5),其中x=-3/8

(3x-1)(2x+3)-(x-2)(6x-5) =6x^2+7x-3-6x^2+17x-10 =24x-13 =-9-13 =-22