Question

Using suitable identities evaluate the following

53²-47²​

Answer 1

Use a^2 - b^2 = (a-b)(a+b)
So
53^2 - 47^2 = (53 + 47)(53 - 47) = 100x6 = 600

Answer 2

53²-47²​

[ (a²-b²)=(a+b)(a-b)]

here a = 53 and b = 47

53²-47²​ = (53 +47)(53-47)

53²-47²​ = 100 × 6

53²-47²​ = 600