16x²-42x+5 zeroes find
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$ 16x^2 - 42x + 5 $
$ = 16x^2 - (40 + 2)x + 5 $
$ = 16x^2 - 40x - 2x + 5 $
$ = 8x (2x - 5) - 1 (2x - 5) $
$ = (2x - 5) (8x - 1) $
$ x = 5/2, 1/8 $
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