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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"?
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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"?

User BangTheBank
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2 Answers

3 votes

Answer:

my answer is 225/5 sorry comments for wrong

User Azamantes
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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
User Jaydeland
by
5.3k points
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