Solving Quadratics by Factorising
Question 1:
x
2
−
x
=
0
x
=
0
or
x
=
1
Question 2:
x
2
−
25
=
0
x
=
5
or
x
=
-5
Question 3:
5
x
2
−
500
=
0
x
=
10
or
x
=
-10
Question 4:
x
2
−
7
x
+
6
=
0
x
=
6
or
x
=
1
Question 5:
x
2
+
4
x
=
21
x
=
-7
or
x
=
3
Question 6:
2
x
2
−
5
x
−
25
=
0
x
=
−
5
2
or
5
