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6 October, 15:37

The excluded values of a rational expression are 2 and 5. Which of the following could be this expression?

x2 - 7x+10

X+5

x2 + 7x + 10

X+5

X+5

x2 + 7x+10

X+5

x2 - 7x+10

+5
Answers (2)
  1. 6 October, 15:43
    0
    Answer: The answer should be B.

    Step-by-step explanation:

    The trinomial equation should go on top

    5 x 2 = 10, & 5 + 2 = 7
  2. 6 October, 15:59
    0
    It's the last choice: (x + 5) / (x^2 - 7x + 10).

    Step-by-step explanation:

    x^2 - 7x + 10

    = (x - 5) (x - 2)

    If these are a denominator of a rational expression then 2 and 5 will be excluded values.

    This is because x = 5 or x = 2 makes the denominator = zero and the function then becomes undefined.

    So the answer is (x + 5) / (x^2 - 7x + 10).
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