Question

If (a+1/a)^2=b, then a^3+1/a^3 is equal to:
A)b^3
B)b^3/2
C)b^3/2 -3b^1/2
D)b^3/2 +3b^1/2

Answer 1

Step-by-step explanation:

c wiil be the answer. please mark as brainlist

Answer 2

$\huge\boxed{Answer}$

(a + 1/a) = √b

Doing Cube both side

(a + 1/a)³ = (√b)³

a³ + 1/a³ + 3(a + 1/a) = b√b

a³ + 1/a³ + 3√b = b√b

a³ + 1/a³ = b³/2 - 3b½