Factorising Quadratics

Question 1:

x2−4x+4
x−2x−2

Question 2:

x2+5x+4
x+4x+1

Question 3:

x2+5x−6
x−1x+6

Question 4:

x2−x−20
x−5x+4

Question 5:

x2+5x−24
x−3x+8

Question 6:

x2+10x+21
x+3x+7