Find the Average Rate of Change f(x)=x^3-12x^2+21x+14 , [-1,9]

Math
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Substitute using the average rate of change formula.
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The average rate of change of a function can be found by calculating the change in values of the two points divided by the change in values of the two points.
Substitute the equation for and , replacing in the function with the corresponding value.
Simplify the expression.
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Simplify the numerator.
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Raise to the power of .
Raise to the power of .
Multiply by .
Multiply by .
Simplify each term.
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Raise to the power of .
Raise to the power of .
Multiply by .
Multiply by .
Subtract from .
Subtract from .
Add and .
Multiply by .
Subtract from .
Add and .
Add and .
Add and .
Simplify the denominator.
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Multiply by .
Add and .
Divide by .
Find the Average Rate of Change f(x)=x^3-12x^2+21x+14 , [-1,9]

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