Solving Quadratics by Factorising
Question 1:
x
2
+
4
x
−
60
=
0
x
=
6
or
x
=
-10
Question 2:
x
2
+
18
x
+
81
=
0
x
=
-9
Question 3:
x
2
+
9
x
+
20
=
0
x
=
-5
or
x
=
-4
Question 4:
x
2
−
6
x
−
16
=
0
x
=
-2
or
x
=
8
Question 5:
x
2
+
15
x
+
54
=
0
x
=
-9
or
x
=
-6
Question 6:
x
2
+
15
x
+
50
=
0
x
=
-10
or
x
=
-5
