Question

(5x + 2)(5x + 2) + (8x + 3)(7 – 2х) - (x + 4)(9x - 1) + 6 = 0.
даю 30 б

Answer 1

Ответ:

25х²+20х+4+56х-16х²+21-6х-9х²-35+4-6=0

0+35+35=0

35х+35=0

35х=-35

х=-1