document.write( "Question 636818: x^4+9x^3+12x^2-11x+21=0 solve the equation in the real number solution \n" ); document.write( "

Algebra.Com's Answer #401241 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "x^4+9x^3+12x^2-11x+21=0    |Note: -3 is a root
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document.write( "using Synthetic Divsion
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document.write( "-3	1	 9	 12	 -11   21
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document.write( " 	 	-3	-18	  18  -21
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document.write( " 	1	 6	-6	   7    0
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document.write( "yields:
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document.write( "      x^3 + 6x^2 - 6x + 7 = 0    |Note:  -7 is a root
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document.write( "using Synthetic Divsion
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document.write( "-7	1	 6	-6	 7   
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document.write( " 	 	-7	7	 -7  
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document.write( " 	1	 -1	1	  0 
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document.write( "yields:
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document.write( "      x^2 - x + 1 = 0 
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