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Answers are given at the end of these exercises. If you get a wrong answer, read the pages listed in red. To complete the square of $x^2+6 x$, add
Step 1
To do this, we take half of the coefficient of x and square it. In this case, the coefficient of x is 6, so half of 6 is 3, and 3 squared is 9. So, we need to add 9 to complete the square. Show more…
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