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Asked by Bethany

I'm doing rational expressions and am so confused.

4x^2-18x+81/8x^3+729
10 years ago

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Answered by Steve
8x^3+729 is the sum of two cubes, so it is

(2x+9)((2x)^2-(2x)(9)+9^2)
= (2x+9)(4x^2-18x+81)

That help?
10 years ago
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I'm doing rational expressions and am so confused.

4x^2-18x+81/8x^3+729

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