Solving Quadratics by Factorising
Question 1:
x
2
+
11
x
+
30
=
0
x
=
-5
or
x
=
-6
Question 2:
x
2
−
9
x
+
20
=
0
x
=
5
or
x
=
4
Question 3:
x
2
+
9
x
+
18
=
0
x
=
-3
or
x
=
-6
Question 4:
x
2
+
3
x
+
2
=
0
x
=
-2
or
x
=
-1
Question 5:
x
2
−
4
x
−
12
=
0
x
=
-2
or
x
=
6
Question 6:
x
2
−
14
x
+
49
=
0
x
=
7
