Question

Solve. 3x2 = –21x – 15

Answer 1

get it into the form of ax^2+bx+c and then you can factor it :D

Answer 2

take 3 common
x2+7x+5=0
solution
x=(-7+(29)^1/2)/2

x=(-7-(29)^1/2)/2

Answer 3

Dont get it help please

Answer 4

apply the formula for calculation of root of quadratic equation

Answer 5

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?

Answer 6

thanks I got it but can you stick around I have a couple more problems that I need help with?

Answer 7

telll mate :)

Answer 8

sure :D sorry OpenStudy was lagging really bad on my computer

Answer 9

its fine
thanks

Answer 10

can you please put this in the form?