9x во 2-ой степени +6x=0
9х^2+6x=0
9x+6=0
9x=-6x
x=-6/9
9х² + 6х = 0
х ( 9х + 6) = 0
х₁ = 0
9х +6 = 0
9х = -6
х₂ = - 6/9
ответ : 0; -6/9.