Completing the Square · x\u00b2 + bx \u2192 (x + b/2)\u00b2 - (b/2)\u00b2
unseel.com · Geometric intuition · quadratic formula derivation
Step
Form
State
Square of side x (area x\u00b2)
Rectangles (width b/2)
Missing corner (b/2)\u00b2
Unseel.com · Completing the Square