Solving Quadratics by Factorising
Question 1:
x
2
+
x
−
30
=
0
x
=
-6
or
x
=
5
Question 2:
x
2
+
x
−
20
=
0
x
=
4
or
x
=
-5
Question 3:
x
2
+
x
−
12
=
0
x
=
3
or
x
=
-4
Question 4:
x
2
+
6
x
+
5
=
0
x
=
-5
or
x
=
-1
Question 5:
x
2
+
6
x
−
40
=
0
x
=
-10
or
x
=
4
Question 6:
x
2
−
12
x
+
35
=
0
x
=
7
or
x
=
5
