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Mathematics
OpenStudy (anonymous):

Solve. 2x2 + x = 15.

OpenStudy (anonymous):

is that 2x squared?

OpenStudy (anonymous):

Yes sir!

OpenStudy (anonymous):

so -3 is one solution, still working on the other

OpenStudy (anonymous):

ya

OpenStudy (anonymous):

\[2x^2+x=15\]-15 -15\[2x^2+x-15=0\] I get this far, then I can't get it to foil. It should be able to go into a (2x-a)(x+b) format, but a and b won't add up.

OpenStudy (anonymous):

@above some quadratic equations cannot be factored :)

OpenStudy (anonymous):

Quadratic Formula! Of course!

OpenStudy (anonymous):

so we use the quadratic formula, or synthetic division since i already got one solution

OpenStudy (anonymous):

(-b +- sqrt(b^2-4ac))/2a

OpenStudy (anonymous):

ill use synthetic you use formula see if we get same answer

OpenStudy (anonymous):

it has a remainder in synth div.

OpenStudy (anonymous):

I got\[x=2.5,-3\]

OpenStudy (anonymous):

same here

OpenStudy (anonymous):

whoaaa i was way off thank you guys so much this is one amazing website! thank you sooo much for putting your time and effort i really appreiciate it!

OpenStudy (anonymous):

No problem

OpenStudy (anonymous):

;D

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