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OpenStudy (anonymous):
r^2-13r+42=0 is it -12r+42=0?
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OpenStudy (anonymous):
You need to factor the equation then solve for r
OpenStudy (anonymous):
(r-6)(r-7) = 0 r = 6, r = 7
OpenStudy (anonymous):
ugh i see what i did. i grouped first
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