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5 votes
If using the method of completing the square to solve the quadratic equation x^2+15x+21=0, which number would have to be added to "complete the square"?

2 Answers

3 votes

Answer:

my answer is 225/5 sorry comments for wrong

answered
User Azamantes
by
7.2k points
6 votes

Explanation:

the answer is in the above image

If using the method of completing the square to solve the quadratic equation x^2+15x-example-1
answered
User Jaydeland
by
7.3k points

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