salathielweslepcfvn0 salathielweslepcfvn0

25-07-2018
Mathematics

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(9x+7)(9x-7) what's the answer

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kelseab1212 kelseab1212

25-07-2018

They cancel each other out because one is + and the other is -.

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teamtommo teamtommo

25-07-2018

81x^2 - 49. The middle terms cancel out because of the opposing signs, but the answer is 81x^2 - 49

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