解方程,(2x-3)²=9(2x+3)² (5x-1)²=3(5x-1) 用适当方式解方程,需解法.

问题描述:

解方程,(2x-3)²=9(2x+3)² (5x-1)²=3(5x-1) 用适当方式解方程,需解法.

这位老兄你这是一道题还是两道题目??????

(2x-3)²=9(2x+3)²
2x-3=±3(2x+3)
2x-3=6x+9 2x-3=-6x-9
x=-3 x=-3/4
(5x-1)²=3(5x-1)
(5x-1)²-3(5x-1)=0
(5x-1)(5x-1-3)=0
x=1/5 x=4/5

(2x-3)²=9(2x+3)²
2x-3=3(2x+3) 2x-3=-3(2x+3)
2x-3=6x+9 2x-3=-6x-9
4x=-12 8x=-6
x=-3 x=-3/4
(5x-1)²=3(5x-1)
(5x-1)(5x-1-3)=0
5x-1=0 5x-4=0
x=1/5 x=4/5

X=3,x=0.8

(2x-3)²=9(2x+3)² 2x-3=±3(2x+3)2x-3=3(2x+3) 或 2x-3=-3(2x+3)2x-3=6x+9 或 2x-3=-6x-9-4x=12 或 8x=-6x1=-3 x2=-3/4(5x-1)²=3(5x-1)(5x-1)²-3(5x-1)=0(5x-1)(5x-1-3)=0(5x-1)(5...