document.write( "Question 125682: a number increased buy 3 time the square root is 28. what is this number \n" ); document.write( "
Algebra.Com's Answer #92069 by josmiceli(19441)\"\" \"About 
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Let \"n\" = the number
\n" ); document.write( "\"n+%2B+3%2Asqrt%28n%29+=+28\"
\n" ); document.write( "\"3%2Asqrt%28n%29+=+28+-+n\"
\n" ); document.write( "square both sides
\n" ); document.write( "\"9n+=+784+-+56n+%2B+n%5E2\"
\n" ); document.write( "\"n%5E2+-+65n+%2B+784+=+0\"
\n" ); document.write( "use quadratic formula
\n" ); document.write( "\"n+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+\"
\n" ); document.write( "\"n+=+%28-%28-65%29+%2B-+sqrt%28+%28-65%29%5E2-4%2A1%2A784+%29%29%2F%282%2A1%29+\"
\n" ); document.write( "\"n+=+%2865+%2B-+sqrt%284225+-+3136+%29%29+%2F+2+\"
\n" ); document.write( "\"n+=+%2865+%2B-+sqrt%28+1089+%29%29+%2F+2+\"
\n" ); document.write( "\"n+=+%2865+%2B+33%29+%2F+2\"
\n" ); document.write( "\"n+=+49\"
\n" ); document.write( "\"n+=+%2865+-+33%29+%2F+2\"
\n" ); document.write( "\"n+=+16\" answer
\n" ); document.write( "check answer
\n" ); document.write( "\"n+%2B+3%2Asqrt%28n%29+=+28\"
\n" ); document.write( "\"16+%2B+3%2Asqrt%2816%29+=+28\"
\n" ); document.write( "\"16+%2B+3%2A4+=+28\"
\n" ); document.write( "\"28+=+28\"
\n" ); document.write( "\"n+=+49\" only works if you SUBTRACT 3 times the square root from number
\n" ); document.write( "\"n+%2B+3%2Asqrt%28n%29+=+28\"
\n" ); document.write( "\"49+-+3%2Asqrt%2849%29+=+28\"
\n" ); document.write( "\"49+-+21+=+28\"
\n" ); document.write( "\"28+=+28\"
\n" ); document.write( "
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