11.1 From Linear to Quadratic: Meeting the Quadratic Equation
Point 5 of 5
11.1.5 Solving by Taking Square Roots
Core idea
When it looks like x²=k or (x+m)²=k, it's like knowing the area and working back to the side length — take the square root of both sides to get x=±√k.
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 · 11.1.5 Solving by Taking Square Roots