You can
put this solution on YOUR website!Factor:
28 + 34c - 12c^2
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All the coefficients are even numbers, so factor out a 2.
=
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From there, it's trial and error. There's no method that applies.
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14 has 2 possible combinations:
1*14 or 2*7
Since it's +14, the signs are the same.
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12 can be 1*12, 2*6 or 3*4, and the signs are different because it's - 12
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Find the numbers that give +17 for the c term.
