Completing the square is a technique used to transform a quadratic expression into a perfect square trinomial. To find the missing term needed to complete the square, we modify the quadratic expression like \(ax^2 + bx\) by adding `\left(\frac{b}{2a}\right)^2`. By adding this term, we can rewrite the expression as a perfect square trinomial. In these worksheets, students will identify and add the missing term `\left(\frac{b}{2a}\right)^2`.
Example: Complete the square for the expression `k^2 - 20k +` `"_____"`.