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

Multiply and simplify: (3x-1)(3x+1)
asked 168k views
2 votes
Multiply and simplify: (3x-1)(3x+1)

asked
User Haventchecked
by
7.7k points

2 Answers

4 votes
the answer is 1 thats what I got
answered
User Kobski
by
8.8k points
3 votes
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
answered
User Zilong Li
by
8.3k points
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