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Mathematics 17 Online
OpenStudy (anonymous):

sqrt3x+24=x+2

OpenStudy (anonymous):

\[\sqrt{3x+24 } =x+2\]

OpenStudy (anonymous):

i square both sides correct?

OpenStudy (anonymous):

3x+24=(x+2)^2

OpenStudy (anonymous):

3x+24=(x+2)^2 3x + 24 = x^2 + 4x + 4

OpenStudy (anonymous):

ok then i use foil. x^2+2x+2x+4 3x+24=x^2+4x+4

OpenStudy (anonymous):

and then? :P

OpenStudy (anonymous):

You got it tena, now combine your like terms

OpenStudy (anonymous):

subtract 24 from both sides... 3x=x^2+4x-20

OpenStudy (anonymous):

sub 3x...0=x^2+x-20

OpenStudy (anonymous):

then i factor that and then a bunch of other stuff lol i dont feel like typing lol :)

OpenStudy (anonymous):

=P

OpenStudy (anonymous):

then i got 4 as the answer.

OpenStudy (anonymous):

You should have 2 answers

OpenStudy (anonymous):

hmm i put in 4 and it was correct.

OpenStudy (anonymous):

0=x^2+x-20 0 = (x+5)(x-4) so x = -5 and x = 4

OpenStudy (anonymous):

i wonder why it said it was correct for just one answer..hmm idk but heck as long as it counted it right lol

OpenStudy (anonymous):

basically in general terms, it's a polynomial function. there's more to elaborate on that but, yeah so polynomial functions usually have more than ONE x value that can make the equation true.

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