Solving Quadratics by Factorising
Question 1:
3
x
2
−
20
x
+
25
=
0
x
=
5
3
or
5
Question 2:
3
x
2
−
2
x
−
5
=
0
x
=
5
3
or
−
1
Question 3:
4
x
2
+
5
x
+
1
=
0
x
=
−
1
4
or
−
1
Question 4:
3
x
2
+
17
x
+
10
=
0
x
=
−
2
3
or
−
5
Question 5:
6
x
2
−
7
x
−
3
=
0
x
=
−
1
3
or
3
2
Question 6:
6
x
2
+
13
x
−
5
=
0
x
=
1
3
or
−
5
2
