Solving Quadratics by Factorising
Question 1:
x
2
+
10
x
+
16
=
0
x
=
-8
or
x
=
-2
Question 2:
x
2
+
4
x
−
5
=
0
x
=
1
or
x
=
-5
Question 3:
x
2
−
10
x
+
16
=
0
x
=
2
or
x
=
8
Question 4:
x
2
+
3
x
−
70
=
0
x
=
-10
or
x
=
7
Question 5:
x
2
+
9
x
−
10
=
0
x
=
1
or
x
=
-10
Question 6:
x
2
+
3
x
−
4
=
0
x
=
1
or
x
=
-4
