Question

Using (x + a)
(i) 103 x 104
sini​

Answer 1

Answer:

(i) 103×104.

(100+3)×(100+4).

By using formula (x+a)×(x+b)=x²+(a+b)x+ab where x=100, a=3 & b=4.

(100+3)×(100+4)=(100)²+(3+4)(100)+(3)(4).

=10000+(7)(100)+12.

=10000+700+12.

=10712.