document.write( "Question 95525: Hello!\r
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document.write( "I have tried working this problem but when I checked my answer it did not work with the problem. Here is the problem:\r
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document.write( "Solve the following equations algebraically:\r
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document.write( "sqrt(2x+3)-sqrt(x+7)=1\r
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document.write( "Here is my work:\r
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document.write( "I squared both sides to give me\r
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document.write( "2x+3-x+7=1\r
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document.write( "Next I added like terms to get x+10=1\r
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document.write( "I brought over the 1 to give me x=9\r
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document.write( "I must be doing something wrong. Any help will be appreicated.\r
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Algebra.Com's Answer #69557 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! sqrt(2x+3)-sqrt(x+7)=1 \n" ); document.write( "Square both sides to get: \n" ); document.write( "(2x+3) - 2sqrt[(2x+3)(x+7)] +(x+7) = 1 \n" ); document.write( "---------- \n" ); document.write( "Simplify: \n" ); document.write( "(3x+10) - 2sqrt[.....] = 1 \n" ); document.write( "------------- \n" ); document.write( "Isolate the sqrt term: \n" ); document.write( "-2sqrt[.....} = 1-3x-10 \n" ); document.write( "------------ \n" ); document.write( "Simplify: \n" ); document.write( "-2sqrt[..........] = -(3x+9) \n" ); document.write( "------------------- \n" ); document.write( "Square both sides to get: \n" ); document.write( "4(2x+3)(x+7) = 9x^2+54x+81 \n" ); document.write( "4(2x^2+17x+21) = 9x^2+54x+81 \n" ); document.write( "8x^2+68x+84 = 9x^2+54x+81 \n" ); document.write( "x^2-14x-3=0 \n" ); document.write( "------------- \n" ); document.write( "Use the quadratic formula: \n" ); document.write( "x = [14+-sqrt(14^2-4*-3)]/2 \n" ); document.write( "x = [14 +- 14.42]/2 \n" ); document.write( "x = 14.21... or x = -0.2111... \n" ); document.write( "---------------- \n" ); document.write( "These answers need to be checked in the original equation as \n" ); document.write( "one or both may be extraneous. \n" ); document.write( "============== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |