pls help

[minor cradle]

idk what they want

an expression in only J?

expression in J and x

idk, im studying

[faint cipher]

(a + b)³ = a³ + b³ + 3ab(a + b)
a³ + b³ = (a + b)³ - 3ab(a + b)

x³ + 1/x³
= (x + 1/x)³ - 3(x + 1/x)
= J

let y = x + 1/x
y³ - 3y = J
y³ - 3y - J = 0

solve for y

[faint cipher]

unfortunately idk too

[faint cipher]

no it's wrong

that is if (x + 1/x)³ = J

[minor cradle]

????

laws of math were thrown out the window

[daring fern]

ohhhh