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March 29, 2017

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Find the domain of the following rational function.

R(x) = -3x^2 / x^2 + 2x - 48

(x+8)(x-6)

So the domain is x cannot be 8 or -6. Am I correct?

  • Math(Please check) - ,

    close ...

    you factored the bottom correctly to
    (x+8)(x-6)

    now each of those can't be zero
    x+8 ≠ 0
    x ≠ -8

    likewise x ≠ 6

    notice the sign inside the bracket changed as you set them equal to x

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