Question

Using identities evaluate (605) (595)

Answer 1

hey mate
here's ur answer

3rd identity
(a+b)(a-b)=a^2-b^2

$= (600 + 5)(600 - 5) \\ = 600(600 - 5) + 5(600 - 5) \\ = 360000 - 3000 + 3000 - 25 \\ = 360000 - 25 \\ = 359975$
hope it helps