document.write( "Question 883674: What are the solutions to this system of equations? \r
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document.write( "x^2 + y^2 = 5
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document.write( "y = 2x \n" );
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Algebra.Com's Answer #533681 by rothauserc(4718)![]() ![]() You can put this solution on YOUR website! substitute 2x for y in the first equation \n" ); document.write( "x^2 + (2x)^2 = 5 \n" ); document.write( "x^2 + 4x^2 = 5 \n" ); document.write( "5x^2 = 5 \n" ); document.write( "x^2 = 1 \n" ); document.write( "x = square root(1) = 1 or -1 \n" ); document.write( "y = 2x = 2 or -2 \n" ); document.write( "we have two solution sets \n" ); document.write( "x = +1, y = +2 or \n" ); document.write( "x = -1, y = -2 \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |