Determine the vertex of
f(x) = x^2 + 8x - 5

(-4,-21)

Step-by-step explanation:

Apply the formula for calculate the x-coordinate of the vertex of the parabola:

Where:

a=1 and b=8

Then, this is:

Now you must substitute x=-4 into the function to obtain the y-coordinate of the vertex.

Then, this is:

Therefore the vertex is:

(-4,-21)

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step-by-step explanation:

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step-by-step explanation: