For $ax^3$ + $bx^2$ + cx + d = 0 with roots alpha, beta, gamma:

• alpha + beta + gamma = -b/a
• alphabeta + betagamma + gamma*alpha = $\frac{c}{a}$
• alphabetagamma = -d/a

This extends Vieta's formulas. In JEE, cubic equations often appear in combination with quadratic theory — e.g., "one root is 1, find the quadratic formed by the other two."