Question

if a-b=3 and ab=4,find the values of a³-b³??​

Answer 1

Answer:

63

Step-by-step explanation:

(a-b)3= (a-b)(a2+b2+ab)

=(a-b)(a2+b2+ab+2ab-2ab)

=(a-b)((a2+b2-2ab)+3ab)

=(a-b)((a-b)2+3ab)

now put values

3 (9+12)

=63

Hope it helps you......