谁最快又好，分就给谁！我会加分
(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-(6x²-29x+20)
=22x-23
=22*(-2)-23
=-67
如果不档歼懂，请追正岩问，祝学习愉举蠢御快！
(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-6x²＋29x-20
=22x-23
=22×（棚岁正链悔雀梁-2）-23
=-44-23
=-67
6x^2-7x-3-6x^2+24x+5x-20=22x-23 吧x=-2带入
得到-67
化简求值:(3x+1)(2x-3)-(6x-5)(x-4),其中x=-2
谁最快又好，分就给谁！我会加分
(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-(6x²-29x+20)
=22x-23
=22*(-2)-23
=-67
如果不档歼懂，请追正岩问，祝学习愉举蠢御快！
(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-6x²＋29x-20
=22x-23
=22×（棚岁正链悔雀梁-2）-23
=-44-23
=-67
6x^2-7x-3-6x^2+24x+5x-20=22x-23 吧x=-2带入
得到-67