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Question 10 of 40
Factor this polynomial completely.
x² - 81
O A. (x-2)(x - 9)
B. (x - 81)(x - 81)
C. (x+81)(x - 81)
O D. (x + 9)(x-9)

Sagot :

Answer:

D) (x + 9)(x-9)

Step-by-step explanation:

[tex]x^2-81[/tex]

Let's Rewrite 81 as → 9^2

[tex]x^2-9^2[/tex]

Now, apply difference two squares formula

[tex]\left(x+9\right)\left(x-9\right)[/tex]

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