Question

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

Answer 1

(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-(6x²-29x+20)
=22x-23
=22*(-2)-23
=-67

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Answer 2

(3x+1)(2x-3)-(6x-5)(x-4)
=6x²-7x-3-6x²＋29x-20
=22x-23
=22×（-2）-23
=-44-23
=-67

Answer 3

6x^2-7x-3-6x^2+24x+5x-20=22x-23 吧x=-2带入
得到-67