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How many zero pairs must be added to the function f(x) = x2 – 10x – 4 in order to begin writing the function in vertex form? A.4 B.10 C.21 D.25
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4 votes
How many zero pairs must be added to the function

f(x) = x2 – 10x – 4 in order to begin writing the function in vertex form?

A.4
B.10
C.21
D.25

User Jovanjovanovic
by
8.1k points

1 Answer

6 votes
f(x) = x² - 10x - 4
f(x) + 4 = x² - 10x

- 10x / 2 = - 5x

- 5² = 25

f(x) + 4 + 25 = (x² - 10x + 25)
f(x) + 29 = (x-5)²
f(x) = (x-5)² - 29

D. 25
User Jackson Allan
by
7.9k points
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