(3х-2)^2=(х-7)(х+5)+8х^2+9

(3х-2)^2 = (х-7)(х+5) + 8х^2 + 9 9x^2 - 12x + 4 = x^2 - 2x - 35 + 8x^2 + 9 9x^2 - 12x + 4 = 9x^2 + 6x - 26 -18x = -30 x = 5/3