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OpenStudy (anonymous):
40x^2-9x-9=0
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OpenStudy (amistre64):
sometimes its just best to go to the quadratic formula
OpenStudy (amistre64):
\[x=\frac{1}{2}(9\pm \sqrt{9^2-4(40)(-9)})\]
OpenStudy (amistre64):
forgot a 40 in there
OpenStudy (hoblos):
=(8x+3)(5x-3) =>x=-3/8 or x=3/5
OpenStudy (amistre64):
the 1/2 = 1/80
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