How to Tell if a Number Is a Root - Example: x³ + x² − 4x − 4 = 0, x = 2

Learn to determine whether a given number is a root of a polynomial equation through a detailed 14-minute mathematics tutorial. Master the fundamental concept of what a root (or zero) means in algebra by working through the specific example of testing whether x = 2 is a root of the cubic equation x³ + x² − 4x − 4 = 0. Discover the step-by-step process of substituting values into polynomial expressions, evaluating the results, and interpreting what it means when an expression equals zero. Explore common mistakes students make when checking roots and gain confidence in polynomial evaluation techniques. Understand how to systematically approach root verification problems and develop the skills needed to tackle similar algebraic challenges. Perfect for algebra students at all levels, homeschool learners, and anyone preparing for standardized tests or seeking to strengthen their polynomial equation skills.