2.(i)  Evaluate the following product without multiplying directly:

   (i)    103 \times 107

Answers (1)

We can rewrite  103 \times 107  as 

\Rightarrow 103 \times 107= (100+3)\times (100+7)

We will use identity

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

Put  x =100 , a=3 \ \ and \ \ b = 7

(100+3)\times (100+7)= (100)^2+(3+7)100+3\times 7

                                               =10000+1000+21= 11021

Therefore, value of 103 \times 107  is  11021

Preparation Products

Knockout KCET 2021

An exhaustive E-learning program for the complete preparation of KCET exam..

₹ 4999/- ₹ 2999/-
Buy Now
Knockout KCET JEE Main 2021

It is an exhaustive preparation module made exclusively for cracking JEE & KCET.

₹ 27999/- ₹ 16999/-
Buy Now
Knockout NEET Sept 2020

An exhaustive E-learning program for the complete preparation of NEET..

₹ 15999/- ₹ 6999/-
Buy Now
Rank Booster NEET 2020

This course will help student to be better prepared and study in the right direction for NEET..

₹ 9999/- ₹ 4999/-
Buy Now
Knockout JEE Main Sept 2020

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 12999/- ₹ 6999/-
Buy Now
Exams
Articles
Questions