Question

Evaluation 103×105 by using suitable identity

Answer 1

Answer:

here we put 103=100+3  ,     105=100+5

Step-by-step explanation:

using identity (x+a)(x+b)=x²+x(a+b)+ab

(100+3)(100+5)

=(100)²+100(3+5)+3×5

=10000+300+500+15

=10000+815

=10815

Answer 2

GIVEN :

• The given number for evaluation is 103 × 105.

TO FIND :

• After evaluating 103 × 105 by using Suitable identities we get = ?

STEP - BY - STEP EXPLAINATION :

( By Using Suitable identities ) :

( X + a ) ( x + b ) = x² + (a + b) x + ab

103 × 105 = (100 + 3) (100 + 5)

= 100² + (3+5) 100 + 3×5

= 10,000 + 8 × 100 + 15

= 10,000 + 800 + 15 = 10,815

Therefore,After evaluating 103 × 105 we get 10,815.