What Is 9xsquard Minus 25?

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Answer:

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9x^2 - 25 = 9x² - 25 = (3x)² - 5² = (3x-5)(3x+5)

Note that the carat (^) is used to denote exponentiation in computer text. Often, it is a good opinion to enclose the base number and the exponent in parenthesis, especially if something more than a single digit is involved.
9(x)^(2)-25

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Comment: Actually, +5/3 and -5/3 are both answers to your equation. The question didn't seem to have any equal sign surrounded by it.

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