Question

(ALGEBRA 2) Please help me with this question. Image is attached ( Please don't answer if you don't know )

Answer 1

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Answer:

• restrictions exclude parts of the domain where the function is not defined. On a graph, they are holes, or vertical asymptotes.
• the denominator might be (x² -4)
• they are different in the same way that adding and multiplying numerical fractions are different

Step-by-step explanation:

1. In general, restrictions on rational functions refer to values of the variable that make the denominator zero. The function will be undefined in that case. On a graph, such a location will show up as a "hole" or a vertical asymptote.

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2. If ±2 are excluded from the domain, we expect factors of (x-2)(x+2) in the denominator. That is, the denominator will have a factor of (x²-4). (There may be other factors that do not have real zeros.)

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3. A rational expression is a fraction the same as any other. The usual rules of addition, subtraction, multiplication, and division apply. For addition and subtraction, it can be useful to identify a common denominator. For multiplication and division, that is not so essential.