document.write( "Question 983431: IF THE SUM OF TWO NUMBERS IS 7 AND THE SUM OF THEIR CUBES IS 133 FIND THE SUM OF THEIR SQUARES? \n" ); document.write( "
Algebra.Com's Answer #604227 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! IF THE SUM OF TWO NUMBERS IS 7 AND THE SUM OF THEIR CUBES IS 133 FIND THE SUM OF THEIR SQUARES? \n" ); document.write( "============= \n" ); document.write( "They're small numbers, to trial and error is the easiest way. \n" ); document.write( "1 & 6 --> 1 + 216 = 217 NG \n" ); document.write( "2 & 5 --> 8 + 125 = 133 \n" ); document.write( "You can find the squares of 2 & 5. \n" ); document.write( "=============== \n" ); document.write( "If the numbers were larger, or not integers: \n" ); document.write( "x + y = 7 \n" ); document.write( "x^3 + y^3 = 133 \n" ); document.write( "Sub for y, y = 7-x \n" ); document.write( "----- \n" ); document.write( "x^3 + (7-x)^3 = 133 \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "It's easy to solve for x when you know the answer.\r \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |