anonymous
  • anonymous
(sqrt2x+13) - 15 = x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Mertsj
  • Mertsj
Add 15 to both sides and then square both sides.
anonymous
  • anonymous
I'm still kind of confused
Mertsj
  • Mertsj
Did you add 15 to both sides?

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More answers

anonymous
  • anonymous
Yeah, I did.
Mertsj
  • Mertsj
What did you get?
anonymous
  • anonymous
\[\sqrt{2x+13} = x + 15\]
Mertsj
  • Mertsj
What do you get if you square the left side?
Mertsj
  • Mertsj
\[(\sqrt{2x=13})^2= ?\]
Mertsj
  • Mertsj
Sorry. I meant + 13 not =
TheViper
  • TheViper
\[\large{\sqrt{2x+13}-15=x}\]\[\large{\sqrt{2x+13}=x+15}\]Now squaring both sides we get\[\large{2x+13=x^2+225+30x}\]
Mertsj
  • Mertsj
You must not square each side. So now it will look like this: \[(\sqrt{2x+13})^2=(x+15)^2\]
Mertsj
  • Mertsj
ok. Too many cooks. Good bye
TheViper
  • TheViper
bye :)
anonymous
  • anonymous
Thanks for leaving I guess... @Mertsj @TheViper are you leaving too or saying goodbye to the other guy?
TheViper
  • TheViper
no
anonymous
  • anonymous
Okay haha
TheViper
  • TheViper
\[\large{2x+13=x^2+225+30x}\]\[\large{\implies x^2+30x-2x+225-13=0}\]\[\large{\implies x^2+28x+212=0}\]Now solve it by factoring :)
anonymous
  • anonymous
You two were both telling me different things. How do I know that yours it right?
TheViper
  • TheViper
We are telling same but concentrate on mine because I m here to help you :)
Mertsj
  • Mertsj
It won't factor. You'll have to use the quadratic formula.
anonymous
  • anonymous
I tried factoring and it didn't work. So I plug x^2 + 28x + 212 into the quadratic formula?
Mertsj
  • Mertsj
yes
TheViper
  • TheViper
yup :)
TheViper
  • TheViper
I think it should be \(-14+2i\) \(\&\) \(-14-2i\)
TheViper
  • TheViper
Check ur calculation again :)

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