document.write( "Question 204225: respected sir,\r
\n" ); document.write( "\n" ); document.write( "plz help me to solve this math prob.\r
\n" ); document.write( "\n" ); document.write( "If the numbers x and y are added to set K {5, 1, 6, 4}, the mean will
\n" ); document.write( "increase by 50%. What is the value of xsquare + 2xy+ysquare? ?\r
\n" ); document.write( "\n" ); document.write( "waiting for yur reply.\r
\n" ); document.write( "\n" ); document.write( "thanks u. \n" ); document.write( "
Algebra.Com's Answer #154190 by nerdybill(7384)\"\" \"About 
You can put this solution on YOUR website!
If the numbers x and y are added to set K {5, 1, 6, 4}, the mean will
\n" ); document.write( "increase by 50%. What is the value of xsquare + 2xy+ysquare? ?
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\n" ); document.write( "Calculate \"mean\" in original set {5, 1, 6, 4}:
\n" ); document.write( "(5+1+6+4)/4
\n" ); document.write( "= 16/4
\n" ); document.write( "= 4
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\n" ); document.write( "From: \"the mean will increase by 50%\" we get:
\n" ); document.write( "(x+y+5+1+6+4)/6 = 4 + .50(4)
\n" ); document.write( "(x+y+5+1+6+4)/6 = 4 + 2
\n" ); document.write( "(x+y+5+1+6+4)/6 = 6
\n" ); document.write( "(x+y+16)/6 = 6
\n" ); document.write( "(x+y+16) = 36
\n" ); document.write( "x+y = 20
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\n" ); document.write( "If we simply \"square\" both sides we get:
\n" ); document.write( "(x+y)^2 = 20^2
\n" ); document.write( "(x+y)(x+y) = 20^2
\n" ); document.write( "Applying FOIL:
\n" ); document.write( "x^2 + xy + xy + y^2 = 400
\n" ); document.write( "x^2 + 2xy + y^2 = 400
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\n" ); document.write( "Solution: 400\r
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