document.write( "Question 896463: if x²+y²+z²-64/xy-yz-zx=-2 and x+y=3z,than value of z is? \n" ); document.write( "

Algebra.Com's Answer #543626 by Edwin McCravy(20056) $\"\"$ $\"About$

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document.write( "Since , .  Substituting:\r\n" );
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document.write( "Divide through by 4\r\n" );
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document.write( "Fctor\r\n" );
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document.write( "z-4 = 0;  z+4 = 0\r\n" );
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document.write( "  z = 4;    z = -4\r\n" );
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document.write( "Edwin

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