If (a+b) = 6 and ab = $$\frac{16}{3}$$, then $$(a^3 + b^3)$$ is equal to:
(a+b) = 6
Cubing both side,
$$\left(a+b\right)^3=6^3$$
$$a^3+b^3+3ab\left(a+b\right)=216$$
$$a^3+b^3+3\times\ \frac{16}{3}\times\ 6=216$$
$$a^3+b^3=216-96=120$$
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 !!!
