Solving Quadratics by Factorising
Question 1:
x
2
−
8
x
+
12
=
0
x
=
2
or
x
=
6
Question 2:
x
2
+
x
−
72
=
0
x
=
-9
or
x
=
8
Question 3:
x
2
−
4
x
+
3
=
0
x
=
1
or
x
=
3
Question 4:
x
2
−
5
x
−
50
=
0
x
=
10
or
x
=
-5
Question 5:
x
2
−
x
−
72
=
0
x
=
-8
or
x
=
9
Question 6:
x
2
−
4
x
−
21
=
0
x
=
-3
or
x
=
7
