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Anonymous
That factors to 3x(3x - 1)
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(3x + 8)(3x - 8)
It is a difference of squares. 9x^2-49=(3x+7)(3x-7)
This is a difference of two squares, which factorises to: (3x - 4y)(3x + 4y)
3x squared minus 25x minus 28
(3x-4)(3x+4)