If a^3 - b^3 = 56 and a - b = 2, then the value of (a^2 + b^2 + ab) is :
it is given that $$a^3 - b^3$$ = 56
we know $$a^3 - b^3 = (a-b)(a^2 + b^2 + ab)$$
a- b = 2 (Given)
hence
$$(a^2 + b^2 + ab)$$ = $$\frac{56}{2}$$ = 28
Create a FREE account and get:
Quick, Easy and Effective Revision
By proceeding you agree to create your account
Free CAT Formulae PDF will be sent to your email address soon !!!
