Question

(5x-2)(5x-2)=9(x+3)(x+3)怎么解

快/完整

Answer 1

(5x-2)(5x-2)=9(x+3)(x+3)
(5x-2)(5x-2)/(x+3)(x+3)=9
(5x-2)/x+3=3,5x-2=3x+9,x1=11/2
(5x-2)/x+3=-3,5x-2=-3x-9,x2=-7/8

Answer 2

把9换成3²
然后都开根号就等于5x-2=3(x+3)或者5x-2=-3x-9
2x=9+2 或者 8x=-7

x=11/2 或者x=-7/8

Answer 3

(5x-2)(5x-2)=9(x+3)(x+3)

（5x-2）^2-9(x+3)^2=0

(5x-2+3x+9)(5x-2-3x-9)=0
(8x+7)(2x-11)=0

x1=-7/8 x2=11/2

Answer 4

5x-2=3(x+3)
5x-2=3x+9
2x=11
x=11/2

5x-2=-3x-9
8x=-7
x=-7/8