Solving Quadratics by Factorising
Question 1:
x
2
+
6
x
=
0
x
=
0
or
x
=
-6
Question 2:
x
2
−
25
=
0
x
=
5
or
x
=
-5
Question 3:
2
x
2
−
72
=
0
x
=
6
or
x
=
-6
Question 4:
x
2
−
9
x
+
8
=
0
x
=
8
or
x
=
1
Question 5:
x
2
+
17
x
=
−
70
x
=
-10
or
x
=
-7
Question 6:
3
x
2
−
4
x
−
4
=
0
x
=
−
2
3
or
2
