(5х-3)(2х+1)-(2х-3)(5х+4)=-3

Question

(5х-3)(2х+1)-(2х-3)(5х+4)=-3

Answer 1

(5х- 3)(2х + 1) - (2х - 3)(5х + 4) = -3

10х^2  + 5x - 6x - 3 - 10x^2 - 8x + 15x + 12  + 3  =  0

6x   =  -12

x  =  -12/6

x  =  -2

 

Ответ.      -2

Answer 2

(5х-3)(2х+1)-(2х-3)(5х+4)=-3

10х^2+5x-6x-3-(10x^2+8x-15x-12)=-3

10х^2+5x-6x-3-10x^2-8x+15x+12=-3

5x-6x-8x+15x=3-3-12

6x=-12

x=-2