Question

5) If a, ß are the roots of quadratic polynomial f(x) = 2x2 - 3x + 7, evaluate
alpha^3 + beta^3.​

Answer 1

Answer:

-99/8

Step-by-step explanation:

${ \alpha }^{3} + { \beta }^{3} = {( \alpha + \beta )}^{3} - 3 \alpha \beta ( \alpha + \beta )$

$= \frac{27}{8} - \frac{63}{4}$

$= \frac{ - 99}{8}$