Question

(5+2.5)(5-2.5) solve​

Answer 1

Answer:

25-6.25=18.75.................

Answer 2

Answer:

Using Identity III, we can solve this problem,

Identity III =

$( x + y)(x - y) = {x}^{2} - {y}^{2}$

According to the question,

$(5 + 2.5)(5 - 2.5) = {5}^{2} - {2.5}^{2}$

$= 25 - 6.25 = 18.75$