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Mathematics 15 Online
OpenStudy (anonymous):

How do you factor: 5x^2 + 3x = -4

OpenStudy (precal):

5x^2+3x+4=0

OpenStudy (precal):

now factor it

OpenStudy (anonymous):

you can derivate it

OpenStudy (anonymous):

Ohh! Thank you.

OpenStudy (precal):

derivate it? what is that?

OpenStudy (precal):

ok so what did you get? we will check it for you

OpenStudy (precal):

prime, you can not factor it

OpenStudy (precal):

|dw:1336433964375:dw| look at the graph, see how it does not cross the x axis. that means that you can not factor it

OpenStudy (anonymous):

find b^2-4ac if the result is the perfect root,,, u can find the factor directly,,, but if not,,, find the factor with X = [-b+or - (b^2-4ac)^0.5]/2a

OpenStudy (precal):

|dw:1336434049083:dw| yes this is the quadratic formula, which will identify your solutions the b^2-4ac is the discriminant and that will tell you how many solutions you will have

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