Question

Evaluate 5.1×5.2 with out actually multiplication.....

Answer 1

5.1*5.2
= (5+0.1)*(5+0.2)

now using (x+a)*(x+b)=x² + (a+b)x + ab

=25+(0.3)5+0.02
=25+1.5+0.02
=26.52

Answer 2

5.1×5.2=26.52 is your answer.
please marks brilliance.