Solving Cubic Equations (Grade 12 NSC Matric Mathematics): Quizzes

$ax^3 + bx^2 + cx + d = 0$

Equation would reduce to quadratic or lower

$(x - a)$ is a factor of the polynomial

Use factor theorem to find one factor

3

Simple integers like $pm 1, pm 2, pm 3$

0

When quadratic factor can't be factorised

Cubic has only one real solution

$x^2 - 4x + 2$