Question

Решите уравнение:

69-(13-у)^2=-y^2

Answer 1

Ответ:

69 - (169 - 26y + y^2) = - y^2

69 - 169 + 26y - y^2 + y^2 = 0

26y - 100 = 0

26y = 100

y = 50/13