document.write( "Question 996961: if x and y are two positive real numbers such that 25x square + 49y s quare equal to 841 and xy equal to 12 then find the value of 125x cube + 343y cube \n" ); document.write( "
Algebra.Com's Answer #615403 by Alan3354(69443)\"\" \"About 
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if x and y are two positive real numbers such that 25x square + 49y s quare equal to 841 and xy equal to 12 then find the value of 125x cube + 343y cube
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\n" ); document.write( "841 = 400 + 441 = 25*4^2 + 49*3^2
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\n" ); document.write( "x = 4, y = 3
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\n" ); document.write( "125*4^3 + 343*3^3 = 8000 + 9261
\n" ); document.write( "= 17261
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