Question

Evaluate (4.6)² using (a+b)²=a²+b²+2ab

Answer 1

(4.6)²

= (4+ 0.6)²

Using identity–

(4+ 0.6)²

= 4² + 2× 4 ×0.6 +(0.6)²

=16 + 4.8 + 0.36

= 21.16