1. © COPYRIGHT @ mhariati
The square of a number is
obtained by multiplying the
number by itself.
Example
The square of 7
= 7 × 7
The square of (– 2.3)
= (– 2.3) × (– 2.3)

2. © COPYRIGHT @ mhariati
Example 1: Find the squares of the following
(integers)
Solution:
= 64
(a) 8 (b) – 4
(a) 82
= 8 × 8
(b) (– 4)2
= (– 4) × (– 4)
= 16
(-)×(-) = +

3. © COPYRIGHT @ mhariati
Example 2: Evaluate of the following
(Fractions)
Solution:
2
5
3
(a) 





2
6
5
1(b) 






2
5
3
(a) 





5
3
5
3

25
9

2
6
5
1(b) 






2
6
11




















6
11
6
11
36
121

(-)×(-) = +
mixed number
improper
fraction

4. © COPYRIGHT @ mhariati
Example 3: Evaluate of the following
(Decimals)
Solution:
2
(a)(0.9)  2
2.1(b) 
 2
9.0(a)
9.09.0 
81.0 1.44
 2
2.1(b) 
   2.12.1 
(-)×(-) = +