Question

Expand using suitable identity : 103 x 107​

Answer 1

Answer:

Expansion=100^2+(3+7)100+3*7

Final solution=11021

Step-by-step explanation:

Split the equation as

(100+3)*(100+7)

It is now in the form of (x+a)*(x+b)

Where x=100, a=3, b=7

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

=100^2+(3+7)100+3*7

=10000+1000+21

=11021