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Mathematics
Thomas Bird
27 January, 17:24
Factor completely. 5x2 - 45
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Frank Contreras
27 January, 17:49
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5 (x-3) (x+3)
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Carson Good
27 January, 18:09
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5 (x + 3) (x - 3)
Step-by-step explanation:
Both terms in this expression have 5 in common---they both have a factor of 5. Therefore you can factor out a 5 like this:
5 (x^2 - 9)
This can be even further factored. Find what two numbers multiply to - 9 but add to 0. - 3 and 3 are numbers that work. You can make x^2 - 9 become (x + 3) and (x - 3).
5 (x + 3) (x - 3) is the final answer simplified completely.
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