Math Problem Statement

Divide.

left parenthesis 4 x cubed minus 4 x squared minus 6 right parenthesis divided by left parenthesis x minus 3 right parenthesis4x3−4x2−6÷(x−3)

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Part 1

left parenthesis 4 x cubed minus 4 x squared minus 6 right parenthesis divided by left parenthesis x minus 3 right parenthesis4x3−4x2−6÷(x−3)equals=enter your response here

​(Simplify your answer. Do not​ factor.)

Solution

To divide the polynomial 4x34x264x^3 - 4x^2 - 6 by x3x - 3, we can use polynomial long division.

Here are the steps:

  1. Divide the leading term of the dividend (the first term of 4x34x264x^3 - 4x^2 - 6) by the leading term of the divisor (x3)(x - 3).

    4x3x=4x2\frac{4x^3}{x} = 4x^2

    Now, multiply 4x24x^2 by the divisor (x3)(x - 3):

    4x2(x3)=4x312x24x^2 \cdot (x - 3) = 4x^3 - 12x^2

  2. Subtract this result from the original polynomial:

    (4x34x26)(4x312x2)=(4x34x26)4x3+12x2=8x26(4x^3 - 4x^2 - 6) - (4x^3 - 12x^2) = (4x^3 - 4x^2 - 6) - 4x^3 + 12x^2 = 8x^2 - 6

  3. Repeat the process with the new dividend 8x268x^2 - 6. Divide the leading term 8x28x^2 by xx:

    8x2x=8x\frac{8x^2}{x} = 8x

    Now, multiply 8x8x by the divisor:

    8x(x3)=8x224x8x \cdot (x - 3) = 8x^2 - 24x

  4. Subtract this from the current dividend:

    (8x26)(8x224x)=8x268x2+24x=24x6(8x^2 - 6) - (8x^2 - 24x) = 8x^2 - 6 - 8x^2 + 24x = 24x - 6

  5. Repeat once more, divide 24x24x by xx:

    24xx=24\frac{24x}{x} = 24

    Now, multiply 2424 by the divisor:

    24(x3)=24x7224 \cdot (x - 3) = 24x - 72

  6. Subtract:

    (24x6)(24x72)=24x624x+72=66(24x - 6) - (24x - 72) = 24x - 6 - 24x + 72 = 66

So, the result of the division is:

4x2+8x+24+66x34x^2 + 8x + 24 + \frac{66}{x - 3}

Final Answer:

4x2+8x+24+66x34x^2 + 8x + 24 + \frac{66}{x - 3}

Would you like more details on polynomial long division, or do you have any questions?


Here are five related questions to practice:

  1. Divide 6x35x2+46x^3 - 5x^2 + 4 by x2x - 2.
  2. Perform the division: x4+3x32xx^4 + 3x^3 - 2x by x+1x + 1.
  3. Divide 5x27x+95x^2 - 7x + 9 by x+2x + 2.
  4. Divide 8x32x+58x^3 - 2x + 5 by 2x12x - 1.
  5. Simplify the expression 2x44x3+x52x^4 - 4x^3 + x - 5 divided by x2x - 2.

Tip:

Always check for factoring opportunities before using long division; it can simplify the process!

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Math Problem Analysis

Mathematical Concepts

Algebra
Polynomial Division
Long Division

Formulas

Polynomial long division steps

Theorems

Division Algorithm for Polynomials

Suitable Grade Level

Grades 10-12