Question

Look at the photo attached for the question, please help asap!

Answer 1

y ≥ - 0.8

Explanation:

`√(25y^2 +40y+16)` = 5y + 4

`√((5y+4)^2)` = 5y + 4

5y + 4 = 5y + 4 and 5y + 4 ≥ 0 ⇒ y ≥ - 0.8

y ∈ [ - 0.8 , ∞ )

- ( 5y + 4 ) = 5y + 4

10y = - 8

y = - 0.8

The answer is y ≥ - 0.8