Complete the Square
Here's an activity to check if you're able to complete the square!
First type in your name in the right panel, and click Ok.
Adjust the values of the coefficients a, b, c, as well as the +/- signs.
Once you are sure that your completed-square answer is correct, click [Confirm].
You can toggle the levels: 1, 2, 3.
As you answer questions correctly for each of the 3 levels, the white square on the right panel will start to fill up. Aim to "complete the square"!
Refeence Guide
If you need help for the steps for completing the square, here are some examples:
[Example 1(a)]
Complete the square for x2 + 8x.
[Example 1(b)]
Complete the square for x2 - 5x.
[Example 2(a)]
Complete the square for 2x2 + 8x.
[Example 2(b)]
Complete the square for -x2 + 10x.
[Example 3(a)]
Complete the square for 5x2 - 20x + 7.
[Example 3(b)]
Complete the square for -2x2 - x +1.