раскроем скобки
7x-x2 = 0
-x2+7x = 0
x2-7x = 0
x(x – 7) = 0
x1 = 0
x – 7 = 0
x2 = 7
Ответ : x1 = 0 , x2 = 7
раскроем скобки
7x-x2 = 0
-x2+7x = 0
x2-7x = 0
x(x – 7) = 0
x1 = 0
x – 7 = 0
x2 = 7
Ответ : x1 = 0 , x2 = 7