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Ainat [17]
2 years ago
15

How do I factorise this?9x²-1​

Mathematics
1 answer:
mr Goodwill [35]2 years ago
8 0
(3x-1)(3x+1)

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)
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