Solving Quadratics by Factorising

Question 1:

x2+12x+27 = 0
x = -3 or x = -9

Question 2:

x2+3x4 = 0
x = 1 or x = -4

Question 3:

x29x+20 = 0
x = 5 or x = 4

Question 4:

x25x6 = 0
x = -1 or x = 6

Question 5:

x2+11x+10 = 0
x = -1 or x = -10

Question 6:

x28x9 = 0
x = 9 or x = -1