Factorising Quadratics

Question 1:

2 x2+5x+3
2x+3x+1

Question 2:

5 x26x8
5x+4x2

Question 3:

3 x2+4x15
3x5x+3

Question 4:

5 x2+3x2
5x2x+1

Question 5:

6 x213x+5
3x52x1

Question 6:

4 x28x5
2x52x+1