20 points for 5 questions about factoring! ! 1. factor 75t 2 + 12. 3(5t + 2)2 3(25t2 + 4) 3(25t2 - 4) 2.factor 6y 2 - 48 + 42y. (6y + 8)(y - 6) 6(y + 8)(y - 1) 6(y - 1)(y - 7) 3. factor -4 + 8a - 4a 2. -4(a - 1)2 -4(a + 1)2 4(a - 1)2 4. factor 5x 4 - 30x 2 - 135. 5(x2 + 9)(x2 - 3) 5(x - 3)(x + 3)(x2 - 3) 5(x - 3)(x + 3)(x2 + 3) 5. factor z 3 + 2z 2 - 9z - 18. (z2 + 9)(z - 2) (z2 + 2)(z - 9) (z - 3)(z + 3)(z + 2) 6. factor a 3 - 3 + 3a 2 - a. (a - 1)(a + 1)(a + 3) (a2 + 1)(a - 3) (a2 - 3)(a + 1)