If using the method of completing the square to solve the quadratic equation x^2 - 5x - 18 = 0, which number would have to be added to "complete the square"?

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asked Dec 8, 2022 32.4k views

2 votes

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

x^2 - 5x - 18 = 0, which number would have to be added to "complete the
square"?

Mathematics
high-school

Maroshii asked

by Maroshii

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1 Answer

2 votes

Answer:

(5/2) ² or 25 /4

Explanation:

x² - 5x - 18 = 0

x² -5x = 18

x² -5x + (5/2)²= 18 + (5/2)²

Eugene Kuleshov answered Dec 12, 2022

by Eugene Kuleshov

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