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Among the following answers, which one contains only factors of x^(3)-81x?

User JoshWillik
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1 Answer

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The factors of
x^(3-81x), we can factor out the common factor, which is x. Now, we can factor the quadratic expression
x^2 - 81 further using the difference of squares formula. The correct option is : x(x - 9)(x + 9)

The factors of
x^(3-81x), we can factor out the common factor, which is x:


x(x^2 - 81)

using the difference of squares formula
(a^2 - b^2 = (a + b)(a - b)):


x(x + 9)(x - 9)

So, the expression
x^(3-81x) can be factored as
x(x - 9)(x + 9). Among the options:

x(x - 9)

x(x + 9)

x(x - 9)(x + 9)

x^2 - 9

The correct answer is option 3: x(x - 9)(x + 9), as it contains only factors of
x^(3-81x).

User Xelnor
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