Solving Quadratics by Factorising
Question 1:
x
2
+
11
x
+
28
=
0
x
=
-4
or
x
=
-7
Question 2:
x
2
+
6
x
+
8
=
0
x
=
-2
or
x
=
-4
Question 3:
x
2
−
7
x
+
10
=
0
x
=
5
or
x
=
2
Question 4:
x
2
−
9
x
+
20
=
0
x
=
5
or
x
=
4
Question 5:
x
2
−
12
x
+
35
=
0
x
=
5
or
x
=
7
Question 6:
x
2
+
x
−
12
=
0
x
=
-4
or
x
=
3
