Solving Quadratic Equations by Completing the Square
\( x^2 = a^2 \Rightarrow x = \pm a \) · Four worked equations
Solve \( x^2 = a^2 \) as \( x = \pm a \)
Find the number that completes a square
Solve a quadratic by completing the square
Handle a coefficient of \( x^2 \) other than 1
Check the roots
\( x^2 = 9 \Rightarrow x^2 = 3^2 \)
\( 3 \times 3 = 9 \) and \( (-3) \times (-3) = 9 \)
So \( x = \pm 3 \)
🔐
The notes are free to read in full.
Create free account Sign in