document.write( "Question 396190: I did the following problem by synthetic division. Since this problem is rather llloooonnnngggg, I decided I need to have someone double check this. Could a tutor please look this over and tell me if I've done this correctly? I would greatly appreciate it! Thx! Here is the problem:\r
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document.write( "x^7+x^5-10x^3+12/ (x+2)\r
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document.write( "Since the divisor isn't in \"x-c\" form, I had to alter that. Also, lots of terms were missing in this problem, so I had to alter that, too. (That is what made this problem looonnnggg!) After I altered it, the problem looked like this:\r
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document.write( "x^7+0x^6+x^5+0x^4-10x^3+0x^2+0x+12 / (x-(-2))\r
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document.write( "My synthetic division went like this:\r
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document.write( "-2_| 1 0 1 0 -10 0 0 12
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document.write( " -2 4 -10 20 -20 40 -80
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document.write( "_____________________________________
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document.write( " 1 -2 5 -10 10 -20 40 -68 as remainder\r
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document.write( "So my answer is:\r
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document.write( "x^6-2x^5+5x^4-10x^3+10x^2-20x+40-68/(x-(-2))
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document.write( "YIKES!! Ok, is this correct, or do I need to go back to the drawing board with this? Any help would be welcomed!!! Thank you!! \n" );
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Algebra.Com's Answer #281109 by CharlesG2(834)![]() ![]() ![]() You can put this solution on YOUR website! \"I did the following problem by synthetic division. Since this problem is rather llloooonnnngggg, I decided I need to have someone double check this. Could a tutor please look this over and tell me if I've done this correctly? I would greatly appreciate it! Thx! Here is the problem:\r \n" ); document.write( "\n" ); document.write( "x^7+x^5-10x^3+12/ (x+2)\r \n" ); document.write( "\n" ); document.write( "Since the divisor isn't in \"x-c\" form, I had to alter that. Also, lots of terms were missing in this problem, so I had to alter that, too. (That is what made this problem looonnnggg!) After I altered it, the problem looked like this:\r \n" ); document.write( "\n" ); document.write( "x^7+0x^6+x^5+0x^4-10x^3+0x^2+0x+12 / (x-(-2))\r \n" ); document.write( "\n" ); document.write( "My synthetic division went like this:\r \n" ); document.write( "\n" ); document.write( "-2_| 1 0 1 0 -10 0 0 12 \n" ); document.write( " -2 4 -10 20 -20 40 -80 \n" ); document.write( "_____________________________________ \n" ); document.write( " 1 -2 5 -10 10 -20 40 -68 as remainder\r \n" ); document.write( "\n" ); document.write( "So my answer is:\r \n" ); document.write( "\n" ); document.write( "x^6-2x^5+5x^4-10x^3+10x^2-20x+40-68/(x-(-2)) \n" ); document.write( " \n" ); document.write( " \r \n" ); document.write( "\n" ); document.write( "YIKES!! Ok, is this correct, or do I need to go back to the drawing board with this? Any help would be welcomed!!! Thank you!!\"\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x^7+x^5-10x^3+12/ (x+2) \n" ); document.write( "filled in the missing terms with 0 coefficients \n" ); document.write( ".................x^6 - 2x^5 + 5x^4 - 10x^3 + 10x^2 - 20x + 40 \n" ); document.write( "x + 2 --> x^7 + 0x^6 + x^5 + 0x^4 - 10x^3 + 0x^2 + 0x + 12 \n" ); document.write( "..........x^7 + 2x^6 \n" ); document.write( "..............- 2x^6 + x^5 \n" ); document.write( "..............- 2x^6 - 4x^5 \n" ); document.write( ".......................5x^5 + 0x^4 \n" ); document.write( ".......................5x^5 + 10x^4 \n" ); document.write( "............................- 10x^4 - 10x^3 \n" ); document.write( "............................- 10x^4 - 20x^3 \n" ); document.write( "......................................10x^3 + 0x^2 \n" ); document.write( "......................................10x^3 + 20x^2 \n" ); document.write( "............................................- 20x^2 + 0x \n" ); document.write( "............................................- 20x^2 - 40x \n" ); document.write( "......................................................40x + 12 \n" ); document.write( "......................................................40x + 80 \n" ); document.write( "...........................................................- 68 \n" ); document.write( "x^6 - 2x^5 + 5x^4 - 10x^3 + 10x^2 - 20x + 40 - 68/(x + 2) is answer \n" ); document.write( "check: \n" ); document.write( "(x + 2)(x^6 - 2x^5 + 5x^4 - 10x^3 + 10x^2 - 20x + 40 - 68/(x + 2)) --> \n" ); document.write( "x^6(x + 2) - 2x^5(x + 2) + 5x^4(x + 2) - 10x^3(x + 2) + 10x^2(x + 2) \n" ); document.write( " - 20x(x + 2) + 40(x + 2) - (68/(x + 2))(x + 2) --> \n" ); document.write( "x^7 + 2x^6 - 2x^6 - 4x^5 + 5x^5 + 10x^4 - 10x^4 - 20x^3 + 10x^3 + 20x^2 \n" ); document.write( " - 20x^2 - 40x + 40x + 80 - 68 --> \n" ); document.write( "x^7 + x^5 - 10x^3 + 12, yes \n" ); document.write( " |