Question

Evaluate 103 × 107.
(With Identity)​

Answer 1

Answer:

using formula,

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

So, x=100

therefore, (100+3) (100+7)

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

=10000 + 10*100 + 21

=10000 + 1000 + 21

= 11021

So 11021 is the answer...

Answer 2

1. 107×103

=(105+2) (105-2)

=(100+7) (100+3)

=(100)^2 (3+7) 100 +(3×7)

=10000+1000+21

=11021.