Solving Quadratics by Factorising
Question 1:
x
2
+
7
x
=
0
x
=
0
or
x
=
-7
Question 2:
x
2
−
9
=
0
x
=
3
or
x
=
-3
Question 3:
2
x
2
−
200
=
0
x
=
10
or
x
=
-10
Question 4:
x
2
+
2
x
−
8
=
0
x
=
2
or
x
=
-4
Question 5:
x
2
+
8
x
=
9
x
=
-9
or
x
=
1
Question 6:
2
x
2
−
7
x
−
15
=
0
x
=
−
3
2
or
5
