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How do I factorise this? 9x²-1​

How do I factorise this? 9x²-1​
asked 33.0k views
4 votes
How do I factorise this?
9x²-1​

asked
User Hitu Bansal
by
7.4k points

1 Answer

1 vote
(3x-1)(3x+1)

Step-by-step explanation:
Since they are both squared 9x^2 and 1^2
Also there is a “-“
So we use this formula to factorize :
a^2 - b^2 = ( a-b) (a+b)
answered
User Gurneet Sethi
by
8.7k points
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