Question

93.5*106.5 solve by identity

Answer 1

Answer:

answer will be 9957.75 done.

Answer 2

Answer:

(100-6.5)(100+6.5)

= (100^2) + (100×6.5) + (-6.5×100) + (-6.5×6.5)

= 10000 + 650 - 650 - 42.25

= 9957.75

Reason:

here I use Identity from class 10,i.e

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

also can be

x^2 + xb +ax +ab

Suggestion :

this is very important identity in class 8, 9, and 10 so, solve as much many practice question for this