Q. Divide the polynomials.The form of your answer should either be p(x) or p(x)+x−3k where p(x) is a polynomial and k is an integer.x−3x3−4x−15=□
Set up long division: Set up the long division.We will use polynomial long division to divide (x3−4x−15) by (x−3).
Divide first term of dividend by first term of divisor: Divide the first term of the dividend by the first term of the divisor.Divide x3 by x to get x2. Multiply (x−3) by x2 and subtract the result from the dividend.xx3=x2(x−3)⋅x2=x3−3x2
Write down result and bring down next term: Write down the result and bring down the next term.After subtracting, we bring down the next term of the dividend, which is −4x.The new dividend is −3x2−4x.
Divide first term of new dividend by first term of divisor: Divide the first term of the new dividend by the first term of the divisor.Divide −3x2 by x to get −3x. Multiply (x−3) by −3x and subtract the result from the new dividend.x−3x2=−3x(x−3)⋅−3x=−3x2+9x
Write down result and bring down next term: Write down the result and bring down the next term.After subtracting, we bring down the next term of the dividend, which is −15.The new dividend is 9x−15.
Divide first term of new dividend by first term of divisor: Divide the first term of the new dividend by the first term of the divisor.Divide 9x by x to get 9. Multiply (x−3) by 9 and subtract the result from the new dividend.x9x=9(x−3)⋅9=9x−27
Write down result and find remainder: Write down the result and find the remainder.After subtracting, we find the remainder.The new dividend is \(-15 - (−27) = 12").The remainder is \(12").
Write final answer: Write the final answer.The quotient is x2−3x+9 with a remainder of 12.The final answer is in the form p(x)+x−3k, where p(x) is the quotient polynomial and k is the remainder.p(x)=x2−3x+9k=12
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