If using the method of completing the square to solve the quadratic equation x2 + 8x + 11 = 0, which number would have to be added to "complete the square"? CORKNG Answer: Submit Answer attempt i out of

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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If using the method of completing the square to solve the quadratic equation
x2 + 8x + 11= 0, which number would have to be added to "complete the
square"?
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Submit Answer
attempt 1 out of
acer
Transcribed Image Text:If using the method of completing the square to solve the quadratic equation x2 + 8x + 11= 0, which number would have to be added to "complete the square"? Answer: Submit Answer attempt 1 out of acer
Expert Solution
Step 1

x² + 8x + 11

= (x² + 2•x•4 + 4²) + (11 - 4²)

= (x + 4)² + (- 5)

 

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