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love2study
love2study love2study
  • 31-01-2017
  • Mathematics
Answered

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

Verified Answer :

apologiabiology
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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Anonymous Anonymous
  • 31-01-2017

the answer is 1  thats what I got

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