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Mathematics 20 Online
OpenStudy (anonymous):

need help solving a radical equation!

OpenStudy (anonymous):

\[\sqrt{51+14w}=w+6\]

OpenStudy (anonymous):

square both sides: 51 +14 w = w^2 + 12 w + 36 Then bring all the terms to the same side w^2-2w-21 = 0 Then use the quadratic equation

OpenStudy (anonymous):

oops, that should be -15 not -21

OpenStudy (anonymous):

Which will then factor. No quadratic formula needed :)

OpenStudy (anonymous):

you get (w-5)(w+3)=0 So w = 5 and -3

OpenStudy (anonymous):

Thank you so much! What exactly was the ^ ? supposed to be the radical sign maybe?

OpenStudy (anonymous):

^ is just used to show something raised to a power.

OpenStudy (anonymous):

gotcha! THanks :)

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