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OpenStudy (anonymous):
Solve 2x2 – 8x = –7
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OpenStudy (anonymous):
do you know the quadratic formula?
OpenStudy (anonymous):
the mx+b?
OpenStudy (anonymous):
no....
OpenStudy (anonymous):
\[\large x=\frac {-b \pm \sqrt{b^2-4ac}}{2a}\] this one...
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