X^2-6x-7=0 help place

Question

X^2-6x-7=0 help place

Answer 1

Х² - 6х - 7 = 0
х² + х - 7х - 7 = 0
х(х+1) - 7(х+1) = 0
(х+1)(х-7) = 0
х+1 = 0     или     х-7 = 0
х = -1                   х = 7

Ответ: х=-1; х=7