let f (x) = - 2x / (x^2-x-5) There are 2 numbers that are not in the domain of f. Give the larger value to 2 decimal places.

Question

Mathematics

Matteo Patel

22 September, 05:27

let f (x) = - 2x / (x^2-x-5) There are 2 numbers that are not in the domain of f. Give the larger value to 2 decimal places.

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Answers (1)

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Barker · Answer 1

Step-by-step explanation:

The 2 numbers that are not in the domain of the function are the 2 numbers that cause the denominator of the function to equal 0. In order to find those 2 numbers, we have to factor the quadratic that is in the denominator. When you factor, you get x = 2.79 and x = - 1.79

Those are the values of x that cause the denominator to equal 0, which of course is NEVER allowed in math!