Solving Quadratics by Factorising
Question 1:
x
2
−
7
x
+
12
=
0
x
=
4
or
x
=
3
Question 2:
x
2
+
17
x
+
72
=
0
x
=
-9
or
x
=
-8
Question 3:
x
2
−
12
x
+
20
=
0
x
=
10
or
x
=
2
Question 4:
x
2
+
3
x
−
54
=
0
x
=
6
or
x
=
-9
Question 5:
x
2
−
13
x
+
36
=
0
x
=
4
or
x
=
9
Question 6:
x
2
+
13
x
+
36
=
0
x
=
-9
or
x
=
-4
