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7obadiah
24.03.2020 •
Mathematics
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
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Ответ:
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).
Ответ: