Question

help please @jcpd910

Answer 1

\[\sqrt{2x + 4}-\sqrt{x}=2\]
Take it step by step. What's the opposite of square rooting something?

Answer 2

@massiel928

Answer 3

its A

Answer 4

Are you just guessing or do you really know how it's A?

Answer 5

\[2x + 4 - x = 16\]
That's after removing the square roots.

Answer 6

^ not actually

\((a+b)^2 = a^2+2ab+b^2\)

Answer 7

Oh yeah, hartnn is right. derp.

Answer 8

A simpler way to do is to test all the choices

plug in x= 0
see if left side = right side
if it equals, x=0 is one solution.

repeat for x=16, -16

Answer 9

Yeah do what hartnn said, much faster.

Answer 10

i worked it out and got A
thank you both

Answer 11

then good work! :)