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left square bracket 2 x plus 3 y plus 4 z right square bracket space left square bracket 4 x squared plus 9 y squared plus 16 z squared minus 6 x y minus 12 y z minus 8 z x right square bracket

Asked by chitranshranjan178 7th December 2015, 6:50 PM
Answered by Expert
Answer:

Hibegin mathsize 14px style U s i n g space c u b i c space i d e n t i t y colon space a cubed plus b cubed plus c cubed minus 3 a b c equals left parenthesis a plus b plus c right parenthesis left parenthesis a squared plus b squared plus c squared minus a b minus b c minus a c right parenthesis  left square bracket 2 x plus 3 y plus 4 z right square bracket left square bracket 4 x squared plus 9 y squared plus 16 z squared minus 6 x y minus 12 y z minus 8 z x right square bracket equals left square bracket 2 x plus 3 y plus 4 z right square bracket left square bracket left parenthesis 2 x right parenthesis squared plus left parenthesis 3 y right parenthesis squared plus left parenthesis 4 z right parenthesis squared minus left parenthesis 2 right parenthesis left parenthesis 3 right parenthesis x y minus left parenthesis 3 right parenthesis left parenthesis 4 right parenthesis y z minus left parenthesis 2 right parenthesis left parenthesis 4 right parenthesis z x right square bracket equals left parenthesis 2 x right parenthesis cubed plus left parenthesis 3 y right parenthesis cubed plus left parenthesis 4 z right parenthesis cubed minus 3 left parenthesis 2 x right parenthesis left parenthesis 3 y right parenthesis left parenthesis 4 z right parenthesis equals 8 x cubed plus 27 y cubed plus 64 z cubed minus 72 x y z end style

Answered by Expert 7th December 2015, 7:09 PM
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