Question

$5x^{2} +5x-15=2 x^{2} +11x+9$ помогите

Answer 1

$3x^2-6x-24=0 \ x^2-2x-8=0 \ D=4+32=36 \ x= frac{2pm6}{2} = left { {{x_1=-2} atop {x_2=4}} right.$