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3 years ago

Find the solution by graphing or from the graph y=x2-2x-8 how do you do this?

Mathematics

1 answer:

Tomtit [17]3 years ago

3 0

Answer:

-2 and 4

Step-by-step explanation:

Graph it using a graphing calculator. The solutions are the points where the graph crosses the x-axis.

I attached a photo of the graph, you can see that the graph crosses the x-axis at points -2 and 4

These are the solutions!

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3 years ago

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Answer:

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2 years ago

Find the equation of the quadratic function with vertex (-2,18) passing through (-5,0)?

Sliva [168]

Answer:

$y-18=-2(x+2)^2$

Step-by-step explanation:

Equation of the Quadratic Function

The vertex form of the quadratic function has the following equation:

$y-k=a(x-h)^2$

Where (h, k) is the vertex of the parabola that results when plotting the function, and a is a coefficient different from zero.

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$y-18=a(x+2)^2$

Now substitute the point (-5,0) and find the value of a:

$0-18=a(-5+2)^2$

Operating:

$-18=a(-3)^2$

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Thus, the equation of the quadratic function is:

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3 years ago

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Answer:

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