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# Factorisation watch

1. I've factorised x^-2 - 16 = 0
to (1/x -4) (1/x + 4) what are the two values of x? I know if it was (2x -3) x= 3/2
Thanks ))
2. (Original post by chloe.oakes)
I've factorised x^-2 - 16 = 0
to (1/x -4) (1/x + 4) what are the two values of x? I know if it was (2x -3) x= 3/2
Thanks ))
So it's the same thing here, isn't it? either or .

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