Precalculus Examples

,
Consider the difference quotient formula. Use this formula to solve for the slope of the secant line .
Find the components of the definition.
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Evaluate the function at .
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Replace the variable with in the expression.
Simplify the result.
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Apply the distributive property.
The final answer is .
Find the components of the definition.
Plug in the components.
Simplify.
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Simplify the numerator.
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Group the last three terms.
Factor.
Multiply by to get .
Remove parentheses.
Remove parentheses.
Factor out of .
Apply the distributive property.
Multiply by to get .
Remove parentheses.
Subtract from to get .
Add and to get .
Subtract from to get .
Add and to get .
Reduce the expression by cancelling the common factors.
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Cancel the common factor.
Divide by to get .
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