Корень уравнения (3х+2)(3х-2)-9(х+2)2=0

(3х+2)(3х-2)-9(х+2)2=0 -40 - 18x + 9x^2  = 0 (9x^2)-18x-40=0 D=1764=42*42 X1= 10/3 X2=-4/3