Question

if a-b = 3 and ab=4
find
a cube minus b cube
with full solution

Answer 1

$a - b = 3 \\ ab = 4 \\ \\ to \: find \\ {a}^{3} - {b}^{3} \\ cubing \: both \: sides \\ {(a - b)}^{3} = 27 \\ {a}^{3} - {b}^{3} - 3 {a}^{2} b + 3a {b}^{2} = 27 \\ {a}^{3} - {b}^{3} - 3ab(a - b) = 27 \\ {a}^{3} - {b}^{3} = 27 + 3(4)(3) \\ = 63ans$
hope it will help you.

Answer 2

please mark this answer as Brainlist