Ask your own question, for FREE!
Mathematics 21 Online
OpenStudy (anonymous):

Solve the equation: 3x^2 + x = -7

OpenStudy (anonymous):

first move -7 to the other side and see what you get

OpenStudy (anonymous):

3x^2+x+7=0..

OpenStudy (anonymous):

(3x ...) (x...)

OpenStudy (anonymous):

okay now which two numbers multiply to 21 and add to 1

OpenStudy (anonymous):

7 and 3

OpenStudy (anonymous):

but they don't add to 1

OpenStudy (anonymous):

in this case you might want to use quadratic formula

OpenStudy (anonymous):

http://en.wikipedia.org/wiki/Quadratic_equation

OpenStudy (anonymous):

All I know is x= -1

OpenStudy (anonymous):

But that is not the proper way

OpenStudy (anonymous):

|dw:1365646111356:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!