Решите уравнение. у+(5у+2)^2=25 (2+у)^2

Question

Решите уравнение. у+(5у+2)^2=25 (2+у)^2

Answer 1

Y + 25y^2 + 20y + 4 = 25(y^2 + 4y + 4)
y + 25y^2 + 20y + 4 = 25y^2 + 100y + 100
25y^2 + 21y + 4 = 25y^2 + 100y + 100
21y + 4 = 100y + 100
21y - 100y = 100 - 4
- 79y = 96
79y = - 96
y = - 96/79