Question

evaluate the following by using identity .
(a) 48^2
​

Answer 1

Step-by-step explanation:

48²

(40+8)²

It is in the form is (a+b)²=a²+2ab+b²

40²+2×40×8+8²

1600+640+64

2304

Answer 2

Answer:

2304

Step-by-step explanation:

48 can also be written as 50 - 2.

48^2

= ( 50 - 2 )^2

Formula : -

( a - b )^2 = a^2 + b^2 + 2ab

Here,

a = 50

b = 2

( 50 - 2 )^2

= 50^2 + 2^2 - 2 ( 50 ) ( 2 )

= 2500 + 4 - 200

= 2504 - 200

= 2304