Question

11) (3x - 1) (3x + 1) =​

Answer 1

Answer:

9x+1

Step-by-step explanation:

$3x - 1) (3x + 1) \\ {x}^{2} + {y}^{2} = (x + y)(x - y) \\ = {(3x)}^{2} + {1}^{2} \\ = 9x + 1$

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Answer 2

Answer:

= 9x² - 3x + 3x - 1

= 9x² - 1

Or, I show you the simplest way

(3x - 1) ( 3x + 1) = (3x - 1 )²

I hope it helps you mate and have a good day