Factorising Quadratics

Question 1:

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

Question 2:

2 x2−11x−6
2x+1x−6

Question 3:

2 x2−9x+4
2x−1x−4

Question 4:

5 x2−2x−3
5x+3x−1

Question 5:

4 x2+20x+25
2x+52x+5

Question 6:

6 x2+7x−20
2x+53x−4