# Math Help - Factoring Trinomials & GCF

1. ## Factoring Trinomials & GCF

I'm stuck on these problems, can anyone help me? Thanks.

1. 8x3 - 56x2 + 80x

2.4v2 + 9v + 5

3. 5c2 - 18c - 8

4. 56b2 + 23b - 63

5. 6a4 + 5a2 -25

6. 3b3 - 9b2 - 54b

Factoring GCF:

7.3x8 y6 + 6x6 y5 +24xy

2. ## Re: Factoring Trinomials & GCF

1: factor out 8x and then you have a quadratic left you can solve using the quadratic formula (when you know the zeros of your polynomial you know the factors)
5: Let $x = a^2$ and you have a quadratic through which you can directly solve with the quadratic formula.
For finding gcf it's mainly practice but in general if you have a polynomial, say $x^n*y^m + x^t*y^v$ factor out $x^a*y^b$ where $a = min (n,t)$ and $b = min(m,v)$