Question

Решите уравнение х(х+14)-56=х(х+7)

Answer 1

х(х+14)-56=х(х+7)
х²+14х-56=х²+7х
х²+14х-56-х²-7х=0
7х=56
х=56/7
х=8
ответ:8

Answer 2

x2+14х-56=x2+7х

x2+14х-x2-7х=56
7х=56
х=8