document.write( "Question 888273: Can u please help me find the integral:
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Algebra.Com's Answer #537256 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "We use the formula \r\n" );
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document.write( "\"int%28du%2F%28a%5E2%2Bu%5E2%29%29\"\"%22%22=%22%22\"\"expr%281%2Fa%29%2Aarctan%28u%2Fa%29%2BC\"\r\n" );
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document.write( "Write the original integral as\r\n" );
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document.write( "\"int%28dx%2F%28%28sqrt%287%29%29%5E2%2B%284x%29%5E2%29%29\"\r\n" );
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document.write( "where \"a=sqrt%287%29\" and \"u=4x\" and \"du=4dx\",\r\n" );
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document.write( "Since du=4dx, in order to have du or 4dx in the numerator we \r\n" );
document.write( "need the dx to be multiplied by 4. So we multiply it by 4\r\n" );
document.write( "and offset by multiplying the whole integral by \"1%2F4\"\r\n" );
document.write( "out in front.  So now we have:\r\n" );
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document.write( "\"expr%281%2F4%29int%284dx%2F%28%28sqrt%287%29%29%5E2%2B%284x%29%5E2%29%29\"\r\n" );
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document.write( "Now we can substitute the right side of the formula \r\n" );
document.write( "\"expr%281%2Fa%29%2Aarctan%28u%2Fa%29%2BC\" for the integral with \r\n" );
document.write( "\"a=sqrt%287%29\" and \"u=4x\"\r\n" );
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document.write( "\"expr%281%2F4%29%2Aexpr%281%2Fsqrt%287%29%29%2Aarctan%284x%2Fsqrt%287%29%29%2BC\"\r\n" );
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document.write( "or\r\n" );
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document.write( "\"expr%281%2F%284sqrt%287%29%29%29%2Aarctan%284x%2Fsqrt%287%29%29%2BC\"\r\n" );
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document.write( "Edwin

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