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The fucntion f(x) = (x^2 + 4x + 30)/(x^2 - 8x + 18) is not one to one. Is it true?

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The fucntion f(x) = (x2 + 4x + 30)/(x2 - 8x + 18) is not one to one. Is it true?

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Here, we can consider any value of f(x) other than 1

Thus, for x = 10 + √94 and 10 – √94 the value of f(x) = 2 

So, f is not one-one function. It is false.

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