Solving Quadratics by Factorising
Question 1:
x
2
+
2
x
=
0
x
=
0
or
x
=
-2
Question 2:
x
2
−
49
=
0
x
=
7
or
x
=
-7
Question 3:
5
x
2
−
20
=
0
x
=
2
or
x
=
-2
Question 4:
x
2
+
4
x
−
32
=
0
x
=
-8
or
x
=
4
Question 5:
x
2
+
4
x
=
45
x
=
5
or
x
=
-9
Question 6:
3
x
2
−
23
x
+
30
=
0
x
=
5
3
or
6
