love2study love2study

31-01-2017
Mathematics

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multiply and simplify: (3x-1)(3x+1)

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apologiabiology apologiabiology

31-01-2017

easily done
the fastest way is to recognize the differnce of 2 perfec squares

(a-b)(a+b)=a²-b²

sp
o
(3x-1)(3x+1)=(3x)²-(1)²=9x²-1

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Аноним Аноним

31-01-2017

the answer is 1 thats what I got

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