Solving Quadratics by Factorising
Question 1:
x
2
+
9
x
=
0
x
=
0
or
x
=
-9
Question 2:
x
2
−
49
=
0
x
=
7
or
x
=
-7
Question 3:
5
x
2
−
500
=
0
x
=
10
or
x
=
-10
Question 4:
x
2
+
5
x
+
6
=
0
x
=
-2
or
x
=
-3
Question 5:
x
2
−
8
x
=
9
x
=
9
or
x
=
-1
Question 6:
2
x
2
+
7
x
+
5
=
0
x
=
−
5
2
or
−
1
