document.write( "Question 932211: Find all real solutions of the equation. Enter DNE in any empty blank.\r
\n" ); document.write( "\n" ); document.write( "2x + √(x + 1)= 34
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Algebra.Com's Answer #566057 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
The idea is to isolate the square root and then square both sides. From there you solve for x.\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2Bsqrt%28x%2B1%29=34\"\r
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\n" ); document.write( "\n" ); document.write( "\"sqrt%28x%2B1%29=34-2x\"\r
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\n" ); document.write( "\n" ); document.write( "\"%28sqrt%28x%2B1%29%29%5E2=%2834-2x%29%5E2\" Square both sides (to eliminate the square root)\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B1=%2834-2x%29%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B1=%2834-2x%29%2834-2x%29\"\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B1=34%2834-2x%29-2x%2834-2x%29\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B1=34%2834%29%2B34%28-2x%29-2x%2834%29-2x%28-2x%29\" Distribute again\r
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\n" ); document.write( "\n" ); document.write( "\"x%2B1=1156-68x-68x%2B4x%5E2\"\r
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\n" ); document.write( "\n" ); document.write( "\"0=1156-68x-68x%2B4x%5E2-x-1\"\r
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\n" ); document.write( "\n" ); document.write( "\"0=4x%5E2-137x%2B1155\"\r
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\n" ); document.write( "\n" ); document.write( "\"4x%5E2-137x%2B1155=0\"\r
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\n" ); document.write( "\n" ); document.write( "Now use the quadratic formula to get these two possible solutions\r
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\n" ); document.write( "\n" ); document.write( "\"x+=+77%2F4\" or \"x+=+15\"\r
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\n" ); document.write( "\n" ); document.write( "Let me know if you need to see the steps to the quadratic formula (I skipped those steps to save space).\r
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\n" ); document.write( "\n" ); document.write( "Let's test each possible solution\r
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\n" ); document.write( "\n" ); document.write( "So let's first test \"x+=+77%2F4\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2Bsqrt%28x%2B1%29=34\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%2877%2F4%29%2Bsqrt%2877%2F4%2B1%29=34\" Plug in \"x+=+77%2F4\"\r
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\n" ); document.write( "\n" ); document.write( "\"43=34\" \r
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\n" ); document.write( "\n" ); document.write( "That last equation above is false. This means \"x+=+77%2F4\" is NOT a true solution. It needs to satisfy the original equation\r
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\n" ); document.write( "\n" ); document.write( "and let's test \"x+=+15\"\r
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\n" ); document.write( "\n" ); document.write( "\"2x%2Bsqrt%28x%2B1%29=34\"\r
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\n" ); document.write( "\n" ); document.write( "\"2%2815%29%2Bsqrt%2815%2B1%29=34\" Plug in \"x+=+15\"\r
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\n" ); document.write( "\n" ); document.write( "\"34=34\"\r
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\n" ); document.write( "\n" ); document.write( "And that final equation is true. So \"x+=+15\" is indeed a true solution.\r
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\n" ); document.write( "\n" ); document.write( "Final Answer:\r
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\n" ); document.write( "\n" ); document.write( "The only solution is \"x+=+15\"\r
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\n" ); document.write( "\n" ); document.write( "If you need more one-on-one help, email me at jim_thompson5910@hotmail.com. You can ask me a few more questions for free, but afterwards, I would charge you ($2 a problem to have steps shown or $1 a problem for answer only).\r
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\n" ); document.write( "\n" ); document.write( "Alternatively, please consider visiting my website: http://www.freewebs.com/jimthompson5910/home.html and making a donation. Any amount is greatly appreciated as it helps me a lot. This donation is to support free tutoring. Thank you.\r
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\n" ); document.write( "\n" ); document.write( "Jim\r
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