Question

Which of the following is out put of 275*275_205*205?

Answer 1

275²- 205²

=(275+205)(275-205)

=480×70

= 33600

Answer 2

Answer:

275x275 - 205x205 = 33600

Step-by-step explanation:

We need to find 275x275 - 205x205

275x275-205x205 = $275^2 - 205^2$

We know the identity $a^2 - b^2$ = (a+b)(a-b) —----(1)

Substituting the value of ‘a’ as 275 and ‘b’ as 205 in equation (1) we get,

$275^2 - 205^2$ = (275+205)(275 -205)

$275^2 - 205^2$= 480 x 70

$275^2 - 205^2$ = 33600

Hence,275x275 - 205x205 = 33600