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Solve. 3x2 = –21x – 15

Algebra
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get it into the form of ax^2+bx+c and then you can factor it :D
take 3 common x2+7x+5=0 solution x=(-7+(29)^1/2)/2 x=(-7-(29)^1/2)/2
Dont get it help please

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Other answers:

apply the formula for calculation of root of quadratic equation
okay, so first we should get everything on the same side so its =0. so to do that we would subtract 3x^2 to get -3x^2-21x-15, now personally i dont like working with negatives so if you multiply it all by -1 you will get 0=3x^2+21x+15, does that make sense?
thanks I got it but can you stick around I have a couple more problems that I need help with?
telll mate :)
sure :D sorry OpenStudy was lagging really bad on my computer
its fine thanks
can you please put this in the form?

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