Solving Quadratics by Factorising
Question 1:
x
2
−
9
x
=
0
x
=
0
or
x
=
9
Question 2:
x
2
−
100
=
0
x
=
10
or
x
=
-10
Question 3:
2
x
2
−
162
=
0
x
=
9
or
x
=
-9
Question 4:
x
2
−
9
=
0
x
=
3
or
x
=
-3
Question 5:
x
2
+
7
x
=
−
12
x
=
-4
or
x
=
-3
Question 6:
3
x
2
−
20
x
+
12
=
0
x
=
2
3
or
6
