Solving Quadratics by Factorising
Question 1:
3
x
2
+
11
x
−
20
=
0
x
=
4
3
or
−
5
Question 2:
5
x
2
+
6
x
−
8
=
0
x
=
4
5
or
−
2
Question 3:
3
x
2
+
7
x
+
2
=
0
x
=
−
1
3
or
−
2
Question 4:
5
x
2
+
27
x
−
18
=
0
x
=
3
5
or
−
6
Question 5:
9
x
2
+
9
x
+
2
=
0
x
=
−
1
3
or
−
2
3
Question 6:
9
x
2
−
3
x
−
2
=
0
x
=
2
3
or
−
1
3
