Posted by William on Friday, January 1, 2010 at 10:23pm.
For the general quadratic equation
ax²+bx+c=0
the sum of the roots is -b/a,
and the product of the roots is c/a.
So we look for an equation where
-b/a = 3/4 and
c/a = -2
(a) and (b) are rejected because c/a>0
for (c),
c/a = -8/4 = -2,
-b/a = -(-3)/4 = 3/4
So the answer is (c)
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