Algebra.Com's Answer #281589 by MathLover1(20849)![\"\"](\"/images/stars/stars-13.gif\")  
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document.write( " | Solved by pluggable solver: Quadratic Formula | \n" );
document.write( "Let's use the quadratic formula to solve for x:
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document.write( " Starting with the general quadratic
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document.write( " the general solution using the quadratic equation is:
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document.write( " So lets solve  ( notice  ,  , and  )
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document.write( "  Plug in a=1, b=-18, and c=47
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document.write( "  Negate -18 to get 18
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document.write( "  Square -18 to get 324 (note: remember when you square -18, you must square the negative as well. This is because  .)
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document.write( "  Multiply  to get 
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document.write( "  Combine like terms in the radicand (everything under the square root)
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document.write( "  Simplify the square root (note: If you need help with simplifying the square root, check out this solver)
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document.write( "  Multiply 2 and 1 to get 2
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document.write( " So now the expression breaks down into two parts
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document.write( "  or 
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document.write( " Now break up the fraction
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document.write( "  or 
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document.write( " Simplify
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document.write( "  or 
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document.write( " So the solutions are:
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document.write( "2.\r
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document.write( " | Solved by pluggable solver: Quadratic Formula | \n" );
document.write( "Let's use the quadratic formula to solve for x:
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document.write( " Starting with the general quadratic
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document.write( " the general solution using the quadratic equation is:
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document.write( " So lets solve  ( notice ,  , and  )
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document.write( "  Plug in a=1, b=-4, and c=-21
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document.write( "  Negate -4 to get 4
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document.write( "  Square -4 to get 16 (note: remember when you square -4, you must square the negative as well. This is because  .)
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document.write( "  Multiply  to get 
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document.write( "  Combine like terms in the radicand (everything under the square root)
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document.write( "  Simplify the square root (note: If you need help with simplifying the square root, check out this solver)
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document.write( "  Multiply 2 and 1 to get 2
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document.write( " So now the expression breaks down into two parts
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document.write( "  or 
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document.write( " Lets look at the first part:
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document.write( "  Add the terms in the numerator
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document.write( "  Divide
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document.write( " So one answer is
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document.write( " Now lets look at the second part:
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document.write( "  Subtract the terms in the numerator
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document.write( "  Divide
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document.write( " So another answer is
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document.write( " So our solutions are:
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document.write( " or
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