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OpenStudy (anonymous):
solve for r using quadratic formula r^2+3r-4=0
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OpenStudy (anonymous):
a = ? b = ? c = ?
OpenStudy (anonymous):
that should help you
jhonyy9 (jhonyy9):
r*2 +3r -4 = 0 3 (+/-) (9+16)*(1/2) 3 +/- 5 r_1 = 4 r_1,_2 = -------------------- = --------- r_2 = -1 2 2
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