Question

Розв'зати рівняння
(х+3)(х+4)-(х+5)(х+4)=18

Answer 1

(х+3)(х+4)-(х+5)(х+4) = 18

х²+4х+3х+12-(х²+4х+5х+20) = 18

х²+4х+3х+12-х²-4х-5х-20-18 = 0

-2х-26 = 0

-2х = 26

х = -13

Answer 2

(х+3)(х+4)-(х+5)(х+4) = 18

х²+4х+3х+12-(х²+4х+5х+20) = 18

х²+4х+3х+12-х²-4х-5х-20-18 = 0

-2х-26 = 0

-2х = 26

х = -13