Question

Using Identities, Evaluate the following: 1. 512 - 492 2. 103 X 104​

Answer 1

Answer:

(i)

Given expression is .

Use identity .

Simplifying the expression we get,

Therefore, value of the given expression is 200.

(ii)

Given expression is .

Use identity .

Simplifying the expression we get,

Therefore, value of the given expression is .

(iii)

Given expression is .

Use identity .

Simplifying the expression we get,

Therefore, value of the given expression is 1800.

(iv)

Given expression is .

Use identity .

Simplifying the expression we get,

Therefore, value of the given expression is

Answer 2

Answer:

1)20

2)10,712 is your answer