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Write y=x²-4x-1 in vertex form.

User Lony
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1 Answer

3 votes

Answer:

y = (x - 2)² - 5

Explanation:

y = x² - 4x - 1

using the method of completing the square

add/subtract ( half the coefficient of the x- term)² to x² - 4x

y = x² + 2(- 2)x + 4 - 4 - 1

y = (x - 2)² - 5 ← in vertex form

User Stiggo
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