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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asked Dec 24, 2022 93.1k views

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"?

Mathematics
college

BangTheBank asked

by BangTheBank

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2 Answers

3 votes

Answer:

my answer is 225/5 sorry comments for wrong

Azamantes answered Dec 26, 2022

by 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

Jaydeland answered Dec 31, 2022

by Jaydeland

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