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0. Factor out greatest common factor (gcf)
0. Factor out greatest common factor (gcf)
& Identify a, b, and c: a = 8, b = 34, c = 15
- Multiply a x c: 8 x 15 = 120
- Find factor pairs of ac
if you already know the factor pair that matches, you can skip to step 3 without finding all factor pairs
3. Add/subtract factor pairs to match b
3. Add/subtract factor pairs to match b
if ac > 0 → add factors to match 👍
if ac < 0 → subtract factors to match
Use same sign rules as past factoring for f1 and f2.
f1 = 30
f2 = 4
note: if no factor pairs match b, then it is not factorable
4. Write in box form
4. Write in box form
→
5. Factor each column up and each row left using greatest common factor of each.
5. Factor each column up and each row left using greatest common factor of each.
(if no common factors, put 1)
Note if the first number in row or column is negative, then the factor is also negative.
6. Write pair in factored form
6. Write pair in factored form
Don't forget any gcf from step 0, goes in front
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