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3 years ago

y = x2 - 6x - 8 Complete the square in the quadratic equation in order to write the equation in vertex form.

Mathematics

1 answer:

Airida [17]3 years ago

8 0

Answer:

y = (x-3)^2 - 17

Step-by-step explanation:

To complete the square, take the middle term bx and divide it in two. Then take the square.

x^2 - 6x - 8 has bx = -6x. Take -6/2 = -3. Square -3^2 = 9.

Now to finish completing the square add 9 and subtract 9 from one side.

y = x^2 - 6x - 8

y = (x^2 - 6x +9) -9 - 8

y = (x-3)^2 - 17

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BigorU [14]

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D. $y=-0.927x+13.634$

Step-by-step explanation:

We graph the points on the graph. The graph is attached.

Let us take two points (1, 14) and (15, 1), and calculate the slope $m$ between them (we choose these points because the line passing through them will be the best fit for all points)

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Thus we have the equation

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Let us now calculate $b$ from the point $(1,14)$

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So the equation we get is

$y=-0.9286x+14.9286$

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