find the product (x-y-z)(x^2+y^2+z^2 xy-yz+xz)
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yup.....
(x-y-z)(x^2+y^2+z^2+3xy-2xy-3yz+2yz+3xz-2xz)
=(x-y-z)[(x-y-z)^2+3(xy-yz+xz)]
=(x-y-z)^3+3(x-y-z)(xy-yz+xz)
= "" "" +3x^2y-3xyz+3x^2z-3xy^2+3y^2z-3xyz -3xyz+3yz^2-3xz^2
= (x-y-z)^3 -9xyz+3x^2(y+z)-3y^2(x+z)-3z^2(y+x)
(x-y-z)(x^2+y^2+z^2+3xy-2xy-3yz+2yz+3xz-2xz)
=(x-y-z)[(x-y-z)^2+3(xy-yz+xz)]
=(x-y-z)^3+3(x-y-z)(xy-yz+xz)
= "" "" +3x^2y-3xyz+3x^2z-3xy^2+3y^2z-3xyz -3xyz+3yz^2-3xz^2
= (x-y-z)^3 -9xyz+3x^2(y+z)-3y^2(x+z)-3z^2(y+x)
anurag8476:
this is not correct answer
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