document.write( "Question 642134: 2^x+4^x+8=28\r
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Algebra.Com's Answer #403971 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "2^x+4^x+8=28\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+%2B+4%5Ex+%2B+8+=+28\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+%2B+%282%5E2%29%5Ex+%2B+8+=+28\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+%2B+2%5E%282x%29+%2B+8+-+28+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5E%282x%29+%2B+2%5Ex+-+20+=+0\" ---- Rearranging terms\r
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\n" ); document.write( "\n" ); document.write( "\"2%5E%282x%29+%2B+1%282%5Ex%29+-+20+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5E%282x%29+%2B+5%282%5Ex%29+-+4%282%5Ex%29+-+20+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+%2A+%282%5Ex+%2B+5%29+-+4%282%5Ex+%2B+5%29+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"%282%5Ex+-+4%29%282%5Ex+%2B+5%29+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+-+4+=+0\" OR \"2%5Ex+%2B+5+=+0\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+=+4\" OR \"2%5Ex+=+-+5\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%5Ex+=+2%5E2\" OR \"2%5Ex+=+-+5\" (IMPOSSIBLE, as no value raised to a power results in a negative value, so ignore)\r
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\n" ); document.write( "\n" ); document.write( "\"highlight_green%28x+=+2%29\"\r
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\n" ); document.write( "\"2%5Ex+%2B+4%5Ex+%2B+8+=+28\"
\n" ); document.write( "\"2%5E2+%2B+4%5E2+%2B+8+=+28\"
\n" ); document.write( "4 + 16 + 8 = 28
\n" ); document.write( "28 = 28 (TRUE)\r
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\n" ); document.write( "\n" ); document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com
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