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2015-05-29T19:57:07+08:00

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Note that a quadratic equation is in the form:
ax²+bx+c

We use the quadratic formula which is:

x = -b ± √(b²-4ac)
            2a
So:
c = ± √(16+48)  4 ± √64 = 4 ± 8 = 0.5 ± 1
            8                    8             8
So c can be equal to 1.5 and -0.5
So: (c-1.5)(c+0.5) = c²-c-0.75
We need to multiply this by 4 for it to be equal to the given, so the factors would be:
(2c-3)(c+1)


            
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