Question

I need a little bit of help.... √(x+2)+4=x

Answer 1

I would subtract 4 from both sides to get
\[ \sqrt{x+2} = x-4 \]

Answer 2

do you know how to "square" both sides?

Answer 3

sqrt(x+2)^2=x-4^2
sqrt(x+4)=x-16?

Answer 4

right idea,
but , learn this simple rule: squaring a square root makes the square root go away

for example
\[ \left(\sqrt{x+2}\right)^2 \text{ becomes } x+2\]

Answer 5

square means multiply by itself
\[ \sqrt{x+2}\cdot \sqrt{x+2} = x+2\]

Answer 6

on the right side
(x-4) squared means
(x-4)(x-4)
so you get

x+2 = (x-4)(x-4)

Answer 7

I would use FOIL to multiply (x-4)(x-4)
See
http://www.khanacademy.org/math/algebra/polynomials/multiplying_polynomials/v/multiplying-binomials
for how to do this