11.1 From Linear to Quadratic: Meeting the Quadratic Equation
Point 4 of 5
11.1.4 What "a Root" Means
Core idea
The root is the x value that makes both sides of the equation balance exactly — plug it back in and you can check on the spot.
Module goal. Picking up from the last stage's linear equations, learn to spot equations with a squared term and understand both their standard look and what a "solution" means.
eastmath.com · 11.1 From Linear to Quadratic: Meeting the Quadratic Equation · 11.1.4 What "a Root" Means