document.write( "Question 762066: Given a polynomial and one of its factors, find the remaining factors of the polynomial. Some of the factors may not be binomials.\r
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document.write( "64x^3-768x^2-9x+8 ; x-12\r
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document.write( "A. (8x-3)
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document.write( "B. (64x^2-9)
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document.write( "C. (8x-3)(8x+3)
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document.write( "D. (8x-3)(8x-3) \n" );
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Algebra.Com's Answer #463684 by Edwin McCravy(20063) You can put this solution on YOUR website! \r\n" ); document.write( "I think this problem was botched. The other tutor's answer in incorrect because\r\n" ); document.write( "you don't have a factor if the remainder isn't 0. And certainly a remainder of\r\n" ); document.write( "100 is not a remainder of 0. \r\n" ); document.write( "\r\n" ); document.write( "I had to change your last term +8 to +108, because otherwise none of those,\r\n" ); document.write( "not even x-12, would have been factors. So I assumed the last term should have\r\n" ); document.write( "been +108, not +8.\r\n" ); document.write( "\r\n" ); document.write( "64x³-768x²-9x+108; x-12 \r\n" ); document.write( "\r\n" ); document.write( "12|64 -768 -9 108\r\n" ); document.write( " | 768 0 -108\r\n" ); document.write( " 64 0 -9 0\r\n" ); document.write( "\r\n" ); document.write( "So 64x³-768x²-9x+108 factors as \r\n" ); document.write( "\r\n" ); document.write( "(x-12)(64x²-9)\r\n" ); document.write( "\r\n" ); document.write( "Then 64x²-9 factors as (8x-3)(8x+3)\r\n" ); document.write( "\r\n" ); document.write( "So the complete factorization is\r\n" ); document.write( "\r\n" ); document.write( "(x-12)(8x-3)(8x+3)\r\n" ); document.write( "\r\n" ); document.write( "So all 7 factors are:\r\n" ); document.write( "\r\n" ); document.write( "1. 1\r\n" ); document.write( "2. x-12 \r\n" ); document.write( "3. 8x-3 \r\n" ); document.write( "4. 8x+3 \r\n" ); document.write( "5. (x-12)(8x-3) = 8x²-99x+36 \r\n" ); document.write( "6. (x-12)(8x+3) = 8x²-93x-36\r\n" ); document.write( "7. (8x-3)(8x+3) = 64x²-9 \r\n" ); document.write( "\r\n" ); document.write( "On your list, A, B, and C are factors, but D is not a factor. \r\n" ); document.write( "(Incidentally, B and C are the same.)\r\n" ); document.write( "\r\n" ); document.write( "Edwin\n" ); document.write( " |