document.write( "Question 607869: if a>0, x^2+y^2=a, and xy=a-10, what is (x+y)^2 in terms of a? \n" ); document.write( "
Algebra.Com's Answer #382937 by jim_thompson5910(35256)\"\" \"About 
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(x+y)^2 = (x+y)(x+y)\r
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\n" ); document.write( "\n" ); document.write( "(x+y)^2 = x^2 + 2xy + y^2\r
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\n" ); document.write( "\n" ); document.write( "(x+y)^2 = (x^2 + y^2) + 2(xy)\r
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\n" ); document.write( "\n" ); document.write( "(x+y)^2 = a + 2(a-10)\r
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\n" ); document.write( "\n" ); document.write( "(x+y)^2 = a + 2a-20\r
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\n" ); document.write( "\n" ); document.write( "(x+y)^2 = 3a-20\r
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