Question

3 sqrt x+4 + 3 sqrt 2x+8=0

Answer 1

B

Explanation:

B. -4

on edg 2021

Answer 2

`3√(x+4)+3√(2x+8)=0`

Subtract
`3√(2x+8)` from both sides.

`3√(x+4)= -3√(2x+8)`

Square and expand both sides.

9x+36=18x+72

Subtract 9x from both sides.

36=9x+72

Subtract 72 from both sides.

-36=9x

Divide both sides by 9.

-4=x

Your answer would be -4.

I hope this helps :)