Solving Quadratics by Factorising

Question 1:

x29x = 0
x = 0 or x = 9

Question 2:

x2 1 = 0
x = 1 or x = -1

Question 3:

3 x2 12 = 0
x = 2 or x = -2

Question 4:

x25x36 = 0
x = -4 or x = 9

Question 5:

x2+14x =49
x = -7

Question 6:

2 x29x+4 = 0
x =12 or 4