Question

Решить уравнение: x2-49=0

Answer 1

$x^2-49 = 0 =\ \textgreater \ x^2 = 49 =\ \textgreater \ x1 =7, x2 = -7$

Answer 2

х²-49 = 0
х² = 49
х = +-√49
х = + - 7 .
Ответ : 7 ; -7 .