Solving Quadratics by Factorising
Question 1:
2
x
2
+
5
x
−
12
=
0
x
=
3
2
or
−
4
Question 2:
2
x
2
−
x
−
15
=
0
x
=
−
5
2
or
3
Question 3:
5
x
2
−
x
−
6
=
0
x
=
6
5
or
−
1
Question 4:
3
x
2
+
13
x
−
30
=
0
x
=
5
3
or
−
6
Question 5:
6
x
2
+
x
−
15
=
0
x
=
−
5
3
or
3
2
Question 6:
6
x
2
−
13
x
−
5
=
0
x
=
5
2
or
−
1
3
