Question

Решите уравнения (х+7)²=(х-3)(х+3)

Answer 1

x^2 + 14x + 49 = x^2 - 9 
14x + 49 = - 9
14x = - 49 - 9 
14x = - 58
x = - 58/14 = - 29/7 = - 4 целых 1/7

Answer 2

(х+7)^2=(х-3)(х+3)
х^2+14х+49=х^2-9
14х=-9-49
14х=-58
х=-4 1/7
Ответ: х=-4 1/7