Solving Quadratics by Factorising
Question 1:
x
2
+
7
x
=
0
x
=
0
or
x
=
-7
Question 2:
x
2
−
25
=
0
x
=
5
or
x
=
-5
Question 3:
5
x
2
−
20
=
0
x
=
2
or
x
=
-2
Question 4:
x
2
+
6
x
−
16
=
0
x
=
-8
or
x
=
2
Question 5:
x
2
−
14
x
=
−
45
x
=
5
or
x
=
9
Question 6:
3
x
2
−
11
x
−
20
=
0
x
=
−
4
3
or
5
