What is the quotient of (24x4+18x3−9x2+3)÷(4x2−3x+1) ?

1 answer

To find the quotient of the polynomial division \((24x^4 + 18x^3 - 9x^2 + 3) ÷ (4x^2 - 3x + 1)\), we can use polynomial long division.

  1. Set up the division: We want to divide \(24x^4 + 18x^3 - 9x^2 + 0x + 3\) by \(4x^2 - 3x + 1\).

  2. Divide the leading terms:

    • Divide the leading term of the dividend (\(24x^4\)) by the leading term of the divisor (\(4x^2\)): \[ 24x^4 ÷ 4x^2 = 6x^2 \]
  3. Multiply and subtract:

    • Multiply \(6x^2\) by the entire divisor: \[ 6x^2(4x^2 - 3x + 1) = 24x^4 - 18x^3 + 6x^2 \]
    • Subtract this from the original polynomial: \[ (24x^4 + 18x^3 - 9x^2 + 0x + 3) - (24x^4 - 18x^3 + 6x^2) = 0 + 36x^3 - 15x^2 + 3 \]
    • This simplifies to \(36x^3 - 15x^2 + 3\).
  4. Repeat the process:

    • Divide the leading term of the new polynomial (\(36x^3\)) by the leading term of the divisor (\(4x^2\)): \[ 36x^3 ÷ 4x^2 = 9x \]
    • Multiply \(9x\) by the entire divisor: \[ 9x(4x^2 - 3x + 1) = 36x^3 - 27x^2 + 9x \]
    • Subtract from the current polynomial: \[ (36x^3 - 15x^2 + 3) - (36x^3 - 27x^2 + 9x) = 0 + 12x^2 - 9x + 3 \]
    • This simplifies to \(12x^2 - 9x + 3\).
  5. Repeat again:

    • Divide \(12x^2\) by \(4x^2\): \[ 12x^2 ÷ 4x^2 = 3 \]
    • Multiply \(3\) by the divisor: \[ 3(4x^2 - 3x + 1) = 12x^2 - 9x + 3 \]
    • Subtract: \[ (12x^2 - 9x + 3) - (12x^2 - 9x + 3) = 0 \]
  6. Final result: At this point, there is no remainder.

Thus, the quotient of \((24x^4 + 18x^3 - 9x^2 + 3) ÷ (4x^2 - 3x + 1)\) is:

\[ \boxed{6x^2 + 9x + 3} \]