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64-z^6

2006-09-11 14:48:47 · 3 answers · asked by green_1_13 1 in Science & Mathematics Mathematics

3 answers

Start with the diff. of 2 squares:

(8+z^3)(8-z^3)

Then use the sum and diff. of cubes formulas:

(2+z)(4-2z+z^2)(2-z)(4+2z+z^2)

2006-09-11 15:45:49 · answer #1 · answered by jenh42002 7 · 0 0

64 - z^6 =
-z^6 + 64 =
-(z^6 - 64) =
-(z - 2)(z + 2)(z^2 - 2z + 4)(z^2 + 2z + 4)

2006-09-12 01:24:52 · answer #2 · answered by Sherman81 6 · 0 0

recognize this is the difference of two perfect squares:
this means that x² - y² = (x+y)(x-y) you have to be able to recognize this pattern in other situations


so apply the trick
(8 + z³) (8 - z³)

2006-09-11 21:50:28 · answer #3 · answered by Scott S 2 · 0 1

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