Question

`sqrt(25y^2+40y+16) =5y+4` Solve the equation?

Answer 1

It is proved that `sqrt[(25y)^2+40y+16] = 5y+4`

Explanation:

Squaring both sides, we get

`sqrt(25y^2+40y+16) = sqrt[(5y)^2+2xx5yxx4+(4)^2`

`rArr [sqrt(5y+4)]^2 = 5y+4` proved