Question

find the value of a³ - b³ if a - b=5 and ab=6​

Answer 1

Answer:

a³-b³=(a-b)(a²+ab+b²)

=(5)×[{(a-b)²+2ab}+ab]

=(5)[({(5)²+2×6}+6]

=5(37+6)

=5×43

=215