Question

(3x-2y+z)(3x+2y-z)怎么化简？

Answer 1

(3x-2y+z)(3x+2y-z)
=[3x-（2y-z)] [3x+（2y-z)]
=（3x）² - （2y-z）²
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Answer 2

(3x-2y+z)(3x+2y-z)
=
(3x-(2y-z))(3x+2y-z)
=(3x)²-(2y-z)²
=9x²-(4y²-4yz+z²)
=9x²-4y²+4yz-z²

Answer 3

(3x-2y+z)(3x+2y-z)
=【3x-（2y-z)】【3x+（2y-z)】
=（3x）² - （2y-z）²
=9x² -

Answer 4

解：(3x-2y+z)(3x+2y-z)
=[3x-(2y-z)][3x+(2y-z)]
=9x^2-(2y-z)^2