3 years ago

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

Mathematics

2 answers:

MrRa [10]3 years ago

8 0

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

EastWind [94]3 years ago

4 0

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

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