Question

please help

Answer 1

muh eyes

Answer 2

Do you know what extraneous means?

Answer 3

Let's start off from the beginning, what have you done so far?

Answer 4

Yeah it's D ^_~

-x = \(\ \sf \sqrt{2x + 15} \)


Undo the square root, you get: x^2 = 2x + 15

Now, move the whole equation to x^2 -2x - 15 = 0

Now factor, 1 * -15 = -15, -5 + 3 = -2, -5*3 = -15

(x - 5)(x + 3) = 0

x = 5
x = -3

When you plug in 5 you get

-(5) = \(\ \sf \sqrt{2(5) + 15} \)
-5 = √25
-5 = 5 <-- this is NOT true, -5 does not equal 5

Answer 5

Yw :3