document.write( "Question 134573: This problem is not from a textbook. Solve the system.
\n" ); document.write( "X2+y2=145
\n" ); document.write( "X+y=17
\n" ); document.write( "The answer choices are
\n" ); document.write( "(9,8) (8,9)
\n" ); document.write( "(-9,-8) (-8,-9)
\n" ); document.write( "(-9,8) (-8,9)
\n" ); document.write( "(9,-8) (8,-9)
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #98452 by stanbon(75887)\"\" \"About 
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X2+y2=145
\n" ); document.write( "X+y=17
\n" ); document.write( "The answer choices are
\n" ); document.write( "(9,8) (8,9)
\n" ); document.write( "(-9,-8) (-8,-9)
\n" ); document.write( "(-9,8) (-8,9)
\n" ); document.write( "(9,-8) (8,-9)\r
\n" ); document.write( "\n" ); document.write( "-----------------
\n" ); document.write( "x = 17-y
\n" ); document.write( "Substitute to get:
\n" ); document.write( "(17-y)+y^2 = 145
\n" ); document.write( "17^2-34y+2y^2 = 145
\n" ); document.write( "2y^2-34y+144 = 0
\n" ); document.write( "y = [34 +- sqrt(34^2-4*2*144)]/4
\n" ); document.write( "y = [34 +- sqrt(4)]/4
\n" ); document.write( "y = [34 +- 2]/4
\n" ); document.write( "y = 9 or 8
\n" ); document.write( "If y = 9, x = 8
\n" ); document.write( "If y = 8, x = 9
\n" ); document.write( "----------------------- \n" ); document.write( "
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