If using the method of completing the square to solve the quadratic equation x2 + 3x + 21 = 0, which number would have to be added to "complete the square"?

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asked Sep 10, 2022 167k views

4 votes

If using the method of completing the square to solve the quadratic equation

x2 + 3x + 21 = 0, which number would have to be added to "complete the
square"?

Mathematics
college

Omid Raha asked

by Omid Raha

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2 Answers

7 votes

Answer:-18.75

Step-by-step explanation:x^2+3x+21-18.75=x^2+3x+2.25=

(x+1.5)^2=-18.75

Jake Lam answered Sep 11, 2022

by Jake Lam

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5 votes

Answer:

Explanation:

Martin Mihaylov answered Sep 13, 2022

by Martin Mihaylov

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