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0. Identify b and c: b = 1, c = -12
0. Identify b and c: b = 1, c = -12
- Find factor pairs of c
hint, start with 1, then 2, 3, etc until it wraps
if you already know the factor pair that matches, you can skip to step 2 without finding all factor pairs
2. c is negative: subtract factor pairs to match b
2. c is negative: subtract factor pairs to match b
f1 = 4
f2 = 3
note: if no factor pairs match b, then it is not factorable
3. Write pair in factored form.
3. Write pair in factored form.
One add, one subtract, since c is negative.
One add, one subtract, since c is negative.
Bigger number gets the same sign as b.
Bigger number gets the same sign as b.
(x + f1)(x - f2)
So since b is positive, 4 is positive.
So since b is positive, 4 is positive.
TClark hint: generally the bigger number goes first in my examples. The the order doesn't matter, but the signs do!
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