Solving Quadratics by Factorising
Question 1:
x
2
−
2
x
−
80
=
0
x
=
10
or
x
=
-8
Question 2:
x
2
−
9
x
+
14
=
0
x
=
2
or
x
=
7
Question 3:
x
2
+
2
x
−
24
=
0
x
=
-6
or
x
=
4
Question 4:
x
2
+
2
x
−
8
=
0
x
=
2
or
x
=
-4
Question 5:
x
2
+
2
x
−
8
=
0
x
=
2
or
x
=
-4
Question 6:
x
2
+
3
x
−
70
=
0
x
=
-10
or
x
=
7
