(9x + 8)(9x - 8)
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81w2 - p2 = (9w + p) (9w - p)because 81w2 - p2 is the difference of squares. To factor the difference of squares, square root both terms and write the binomial twice:(9w ? p) (9w ? p)Now, to replace the question marks, one binomial has to replace it with the plus sign, while the other binomial gets a minus sign:(9w + p) (9w - p)
(x - 16)(x + 2) x = 16 or -2
It is (A-1)(A+1) when factored
(7x + 8)(7x - 9)
(2x - 1)(4x + 1)