Question

(x +8)(x -5) -(x -7)(x +7) =3

Answer 1

(х+8)(х-5)-(х-7)(х+7) = 3
х²-5х+8х-40-х²+49 = 3
х²-х²-5х+8х = 3+40-49
3х = -6
х = -6 : 3
х = -2
Ответ: -2.

Answer 2

X^2-5x+8x-40-x^2+7x-7x-49=3
3x=92