document.write( "Question 919862: Solve the system by elimination or substitution.
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\n" ); document.write( "2x^2+xy-84=0 \n" ); document.write( "
Algebra.Com's Answer #558050 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "Solve the system by elimination or substitution.
\n" ); document.write( "3y^2=xy
\n" ); document.write( "2x^2+xy-84=0
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document.write( "Solve the system by elimination or substitution.
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document.write( "\"3y%5E2+=+xy\"______\"x+=+3y%5E2%2Fy\"______\"x+=+3y\" ------ eq (i)
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document.write( "\"2x%5E2+%2B+xy+-+84+=+0\" ------ eq (ii)
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document.write( "\"2%283y%29%5E2+%2B+y%283y%29+-+84+=+0\" -------- Substituting 3y for x in eq (ii)
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document.write( "\"2%289y%5E2%29+%2B+3y%5E2+-+84+=+0\"
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document.write( "\"18y%5E2+%2B+3y%5E2+-+84+=+0\"
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document.write( "\"21y%5E2+-+84+=+0\"
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document.write( "\"21%28y%5E2+-+4%29+=+21%280%29\"
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document.write( "\"y%5E2+-+4+=+0\"_____\"y+=+0+%2B-sqrt%284%29\"________\"highlight_green%28y+=+0%2B-2%29\"
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document.write( "\"x+=+3%282%29\" -------- Substituting 2 for y in eq (i)
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document.write( "\"highlight_green%28x+=+6%29\"
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document.write( "\"highlight_green%28highlight_green%28system%28x+=+6_when%2Cy+=+2%29%29%29\"\r
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document.write( "\"x+=+3%28-+2%29\" ------ Substituting - 2 for y in eq (i)
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document.write( "\"highlight_green%28x+=+-+6%29\"
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document.write( "\"highlight_green%28highlight_green%28system%28x+=+-+6_when%2Cy+=+-+2%29%29%29\" \n" );
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