2 years ago

Determine and state the vertex of f(x) = x2– 2x – 8 using the method of completing the square.

Mathematics

1 answer:

timurjin [86]2 years ago

3 0

Answer:x²-2x-8

X²-2x=8

X²= -2x + (-1)² = 8 + (-1)²

X²= -2x + 1 = 8 + 1

X²= -2x + 1 = 9

(X-1)² = 9

√(x-1)² = √9

X-1 = ± 3

X= 1 + 3= 4

X= 1 - 3= -2

X= 4 or X= -2

Step-by-step explanation:

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