Solving Quadratics by Factorising
Question 1:
x
2
+
4
x
−
60
=
0
x
=
-10
or
x
=
6
Question 2:
x
2
+
7
x
+
12
=
0
x
=
-3
or
x
=
-4
Question 3:
x
2
+
4
x
+
4
=
0
x
=
-2
Question 4:
x
2
+
8
x
−
20
=
0
x
=
-10
or
x
=
2
Question 5:
x
2
−
3
x
−
18
=
0
x
=
-3
or
x
=
6
Question 6:
x
2
+
x
−
90
=
0
x
=
-10
or
x
=
9
