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24-05-2021
Mathematics

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Which is a factor of 45x^4−5x^2? Show work.

a. 5x+2 b. 9x−1 c. 6x+5 d. 3x−1

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cwrw238 cwrw238

24-05-2021

Answer:

d. 3x - 1.

Step-by-step explanation:

45x^4−5x^2

The GCF is 5x^2 so we have:

5x^2(9x^2 - 1)

The expression in the parentheses is the difference of 2 squares so:

= 5x^2(3x - 1)(3x + 1)

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