For exercises 1–6, factor the expanded form of these quadratic expressions. pay particular attention to the negative and
positive signs.
1. 3x^2 − 2x − 8
2. 3x^2 + 10x − 8
3. 3x^2 + x − 14 [notice that there is a 1 as a coefficient in this one.]
4. 2x^2 − 21x − 36 [this might be a challenge. if it takes too long, try the next one.]
5. −2x^2 + 3x + 9 [this one has a negative on the leading coefficient.]
6. + 6
4 + 9
16 [we need to try one with fractions, too.]
for exercises 7–10, use the structure of these expressions to factor completely.
7. 100x^2 − 20x −63
8. y^4 + 2y^2 − 3
9. 9x^2 − 3x − 12
10. + − 6