Factorising Quadratics

Question 1:

x26x+8
x2x4

Question 2:

x28x+15
x3x5

Question 3:

x29x+20
x4x5

Question 4:

x2+8x+7
x+7x+1

Question 5:

x211x+24
x3x8

Question 6:

x29
x3x+3