Question

Prove that the value of the expression: 731^3−631^3 is divisible by 100

Answer 1

Explanation:

The formula for a^3 - b^3 = (a-b)(a^2+ab+b^2)

By Substitution, (731-631) ( 731^2 + 731x631 +631^2)

= 100 ( 731^2 + 731x631 +631^2)

Therefore it is divisible by 100

Answer 2

is divisible by((731^3) - (631^3), 100) = True

Explanation: