What number must you add to complete the square? x^2+12x=33

The formula of square is:


Let's find from the equation above:



Let's find from the equation above by replacing with :




If and then our square should look like:


Let's move 33 to the left side of equation and see what we have:


Finally subtract from and you will have the number you have to add to complete the square:


So, the correct answer is 69.

The second step on the test was the move he was supposed to

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