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CBSE Class 12-science Answered

Prove that       x+y        x     x
                      5x+4y    4x   2x = x^3
                      10x+8y  8x   3x
Asked by Jerrin Thomas | 16 Jan, 2015, 12:29: PM
answered-by-expert Expert Answer
open vertical bar table row cell x plus y end cell x x row cell 5 x plus 4 y end cell cell 4 x end cell cell 2 x end cell row cell 10 x plus 8 y end cell cell 8 x end cell cell 3 x end cell end table close vertical bar equals x cubed L. H. S. comma equals open vertical bar table row cell x plus y end cell x x row cell 5 x plus 4 y end cell cell 4 x end cell cell 2 x end cell row cell 10 x plus 8 y end cell cell 8 x end cell cell 3 x end cell end table close vertical bar equals x squared open vertical bar table row cell x plus y end cell 1 1 row cell 5 x plus 4 y end cell 4 2 row cell 10 x plus 8 y end cell 8 3 end table close vertical bar equals x squared left square bracket left parenthesis x plus y right parenthesis left parenthesis 12 minus 16 right parenthesis minus 1 left parenthesis 15 x plus 12 y minus 20 x minus 16 y right parenthesis plus 1 left parenthesis 40 x plus 32 y minus 40 x minus 32 y right parenthesis right square bracket equals x squared left square bracket minus 4 x minus 4 y plus 5 x plus 4 y plus 0 right square bracket equals x squared left square bracket x right square bracket equals x cubed
Answered by Prasenjit Paul | 16 Jan, 2015, 03:17: PM

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