Square Of a Number

 Square of a Number

    To square a number, just multiply it by itself.

That is,

a² = a*a
also, we can write it as
 a^2 = a*a (^ is the symbol of exponent)

Example

1) Find a square of 2

here the number is 2

to find a square of a number we have to multiply that number by itself

square of 2 = 2*2 =4

that is, 2^2=2*2=4

2) Find a square of 3

3²=3*3=9

3) Find a square of 7

7²=7*7 = 49

4) Find a square of (-5)

(-5)² = -5 * -5 = 25 

Note 

- * - = +  (-3 * -3 = 9)

- * + = -  (-3 * 3 = -9)

+ * - = -  (3 * -3 = -9)

+ * + = + (3 *  3 = 9)

5) Solve (8-4)²

8-4 = 4

(8-4)² = 4² = 4*4 = 16

6) Solve (15-25)²

15-25 = -10

(15-25)² = (-10)² = -10 * -10 = 100

Note

5-3 = 2

-5-3 = -8

-5+3 = -2

5+3 = 8