Question

(sqrt2x+13) - 15 = x

Answer 1

Add 15 to both sides and then square both sides.

Answer 2

I'm still kind of confused

Answer 3

Did you add 15 to both sides?

Answer 4

Yeah, I did.

Answer 5

What did you get?

Answer 6

\[\sqrt{2x+13} = x + 15\]

Answer 7

What do you get if you square the left side?

Answer 8

\[(\sqrt{2x=13})^2= ?\]

Answer 9

Sorry. I meant + 13 not =

Answer 10

\[\large{\sqrt{2x+13}-15=x}\]\[\large{\sqrt{2x+13}=x+15}\]Now squaring both sides we get\[\large{2x+13=x^2+225+30x}\]

Answer 11

You must not square each side. So now it will look like this:
\[(\sqrt{2x+13})^2=(x+15)^2\]

Answer 12

ok. Too many cooks. Good bye

Answer 13

bye :)

Answer 14

Thanks for leaving I guess... @Mertsj

@TheViper are you leaving too or saying goodbye to the other guy?

Answer 15

no

Answer 16

Okay haha

Answer 17

\[\large{2x+13=x^2+225+30x}\]\[\large{\implies x^2+30x-2x+225-13=0}\]\[\large{\implies x^2+28x+212=0}\]Now solve it by factoring :)

Answer 18

You two were both telling me different things. How do I know that yours it right?

Answer 19

We are telling same but concentrate on mine because I m here to help you :)

Answer 20

It won't factor. You'll have to use the quadratic formula.

Answer 21

I tried factoring and it didn't work. So I plug x^2 + 28x + 212 into the quadratic formula?

Answer 22

yes

Answer 23

yup :)

Answer 24

I think it should be \(-14+2i\) \(\&\) \(-14-2i\)

Answer 25

Check ur calculation again :)