Question

favor a resoluçao desta questao

(3x+1).(x-1)-3(x+2)²=-9

Answer 1

(3x+1).(x-1)-3(x+2)²=-9

3X² - 3X + X - 1 - 3( X² + 4X +  4) = - 9

3X² - 3X + X - 1 - 3X² - 12X - 12 = - 9

- 14X = - 9 + 13

- 14X = 4(-1)
 14X = - 4

X = - 4/14