(x+3)квадрат - (х-2) (х+3) = 0

(x + 3)^2 - (x - 2)(x + 3) = 0 (x + 3) (x + 3 - (x - 2)) =  0(x + 3) (x + 3 - x  + 2) = 0(x + 3)*5 = 0  /:5x + 3 = 0 x = - 3