AnswersAlgebra III ACompleting the Square

Completing the Square Answers

6 verified answers
1
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What is f(x) = x2 – 8x + 11 written in vertex form?

A
f(x) = (x – 4)2 – 5
B
f(x) = (x – 4)2 + 5
C
f(x) = (x + 4)2 – 27
D
f(x) = (x + 4)2 + 27
2
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Sample Response: A quadratic function in standard form is converted to vertex form by completing the square. The first two terms are used to create a perfect square trinomial after a zero pair is added. The zero pair is found by taking half of the x-term coefficient and squaring it. The original constant term and the negative value of the zero pair are then combined.

Answer not available
80593

671314

A
6
B
7
C
13
D
14
80594

21324354

A
21
B
32
C
43
D
54
83540

x + 3x + 9x + 12x + 36

A
+ 3
B
+ 9
C
+ 12
D
+ 36

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Completing the Square Answers — Algebra III A