document.write( "Question 906528: Hi, would you help me solve this problem, please? \r
\n" ); document.write( "\n" ); document.write( "Directions: Solve the equation by making the appropriate substitution. (meaning \"u\" for \"x\").\r
\n" ); document.write( "\n" ); document.write( " $\"+x%5E%287%2F2%29-6x%5E%287%2F4%29%2B9=0+\"$ \r
\n" ); document.write( "\n" ); document.write( "I let $\"+u=x+\"$ and $\"+u%5E2=x%5E%287%2F2%29+\"$ , but am unsure of how to take it from there.
\n" ); document.write( "**All of the numerators of the exponents are 7, just in case that got cut off in the formula plotting system. \r
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Algebra.Com's Answer #549925 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "There is a way to make the plotting system handle fraction exponents,\r\n" );
document.write( "Place the expression in a 2x1 matrix with the blank character \"\" as the\r\n" );
document.write( "upper element and the fraction exponent as the lower element.\r\n" );
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document.write( "Don't let u=x. Let  and . You had that right. \r\n" );
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document.write( "becomes\r\n" );
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document.write( "Then factor:\r\n" );
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document.write( "And there's just one solution, u=3\r\n" );
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document.write( "Then  becomes\r\n" );
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document.write( "Then we raise both sides to the 'reciprocal'th power, \r\n" );
document.write( "the ths power\r\n" );
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document.write( "When you multiply those exponents on the right you get\r\n" );
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document.write( "The answer is 'the seventh root of three to the fourth power'.\r\n" );
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document.write( "or approximately 1.873444005\r\n" );
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document.write( "Edwin

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