Question

(2ⅹ 6-7) (ⅹ-7)=52求解过程

Answer 1

(2x+6-7)(x-7)=52,
(2x-1)(x-7)=52,
2x²-15x+7=52,
2x²-15x-45=0，
判别式△=(-15)²-4×2×(-45)=585=(3√65)²，
x1=(15+3√65)/4，
x2=(15-3√65)/4

Answer 2

(2ⅹ 6-7) (x-7)=52
解：(12-7)(x-7)=52
5(x-7)=52
5x-35=52
5x=52+35
5x=87
x=17.4。