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04-02-2022
Mathematics

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How to factor this expression: x^2-9?

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ItsDingy ItsDingy

04-02-2022

Answer:

(x+3)(x-3)

Step-by-step explanation:

rewrite "9" as 3^2

so it is x^2-3^2

You use the difference of squares: a^2-b^2=(a+b)(a-b)

apply it: (x+3)(x-3)

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