Solving Quadratics by Factorising
Question 1:
x
2
−
4
x
+
3
=
0
x
=
1
or
x
=
3
Question 2:
x
2
−
36
=
0
x
=
-6
or
x
=
6
Question 3:
x
2
−
18
x
+
81
=
0
x
=
9
Question 4:
x
2
−
10
x
+
24
=
0
x
=
6
or
x
=
4
Question 5:
x
2
−
4
x
−
45
=
0
x
=
-5
or
x
=
9
Question 6:
x
2
+
10
x
+
21
=
0
x
=
-3
or
x
=
-7
