document.write( "Question 59095: Please help w/ the following:\r
\n" ); document.write( "\n" ); document.write( "27x^3-8=0\r
\n" ); document.write( "\n" ); document.write( "Thank you.
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Algebra.Com's Answer #40525 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Formula for the factoring of the difference of cubes:\"highlight%28u%5E3-v%5E3=%28u-v%29%28u%5E2%2Buv%2Bv%5E2%29%29\"
\n" ); document.write( "\"27x%5E3-8=0\"
\n" ); document.write( "\"%283x%29%5E3-%282%29%5E3=0\" u=3x and v=2
\n" ); document.write( "\"%283x-2%29%28%283x%29%5E2%2B%283x%29%282%29%2B%282%29%5E2%29=0\"
\n" ); document.write( "\"%283x-2%29%289x%5E2%2B6x%2B4%29=0\"
\n" ); document.write( "\"3x-2=0\" and \"9x%5E2%2B6x%2B4=0\"
\n" ); document.write( "\"3x-2%2B2=0%2B2\"
\n" ); document.write( "\"3x=2\"
\n" ); document.write( "\"3x%2F3=2%2F3\"
\n" ); document.write( "\"highlight%28x=2%2F3%29\" This is the real solution that we found before. You have to use the quadratic formula to find the complex solution.
\n" ); document.write( " When a quadratic equation is in standard form:\"highlight%280=ax%5E2%2Bbx%2Bc%29\" the quadratic formula can be applied: \"highlight%28x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29%29\"
\n" ); document.write( "For \"9x%5E2%2B6x%2B4=0\" a=9, b=6 and c=4
\n" ); document.write( "\"x=%28-%286%29%2B-sqrt%28%286%29%5E2-4%289%29%284%29%29%29%2F%282%289%29%29\"
\n" ); document.write( "\"x=%28-6%2B-sqrt%2836-144%29%29%2F18\"
\n" ); document.write( "\"x=%28-6%2B-sqrt%28-108%29%29%2F18\"
\n" ); document.write( "\"x=%28-6%2B-sqrt%28-1%29%2Asqrt%2836%29%2Asqrt%283%29%29%2F18\"
\n" ); document.write( "\"x=%28-6%2Bor-6%2Asqrt%283%29%2Ai%29%2F18\"
\n" ); document.write( "\"x=6%28-1%2B-sqrt%283%29%2Ai%29%2F%286%2A3%29\"
\n" ); document.write( "\"x=%28-1%2B-sqrt%283%29%2Ai%29%2F3\"
\n" ); document.write( "Happy Calculating!!!\r
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\n" ); document.write( "\n" ); document.write( "Happy Calculating!!!
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