Solving Quadratics by Factorising
Question 1:
x
2
+
6
x
+
9
=
0
x
=
-3
Question 2:
x
2
−
13
x
+
40
=
0
x
=
8
or
x
=
5
Question 3:
x
2
−
16
=
0
x
=
4
or
x
=
-4
Question 4:
x
2
−
x
−
72
=
0
x
=
-8
or
x
=
9
Question 5:
x
2
+
2
x
−
35
=
0
x
=
5
or
x
=
-7
Question 6:
x
2
−
4
x
−
12
=
0
x
=
-2
or
x
=
6
