Question

using the identity the value obtained from the product 25.4*24.6​

Answer 1

(a+b) (a-b)=a square minus b square identity could be used

a=25

b= 0.4

(25+0.4)(25-0.4)

= 25 square minus 0.4 square

= 625- 0.16

=624.84

Hope it helps :)