Question

Ayuudaaaaaa
1.  (12x 7 ) (12x-7) = 2 ( 12x - 9) + 86

Answer 1

$(12x+7)(12x-7)=2(12x-9)+86$
$144x^{2}-49=24x-18+86$
$144x^{2}-24x-117=0$
$48x^{2}-8x-39=0$
$x _{1}=0,99$
$x_{2}=-0,82$