Questions: Perform the indicated operation and simplify if possible by (3x-4)(x^2-6x-9)

Perform the indicated operation and simplify if possible by
(3x-4)(x^2-6x-9)
Transcript text: Perform the indicated operation and simplify if possible by \[ (3 x-4)\left(x^{2}-6 x-9\right) \]
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Solution

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Solution Steps

To solve the given expression, we need to perform polynomial multiplication. This involves distributing each term in the first polynomial, \(3x - 4\), across each term in the second polynomial, \(x^2 - 6x - 9\). After distributing, we combine like terms to simplify the expression.

Step 1: Distribute Each Term

To solve the expression \((3x - 4)(x^2 - 6x - 9)\), we begin by distributing each term in the first polynomial across each term in the second polynomial. This involves multiplying each term in \(3x - 4\) by each term in \(x^2 - 6x - 9\).

Step 2: Perform the Multiplication
  • Multiply \(3x\) by each term in \(x^2 - 6x - 9\):

    • \(3x \cdot x^2 = 3x^3\)
    • \(3x \cdot (-6x) = -18x^2\)
    • \(3x \cdot (-9) = -27x\)
  • Multiply \(-4\) by each term in \(x^2 - 6x - 9\):

    • \(-4 \cdot x^2 = -4x^2\)
    • \(-4 \cdot (-6x) = 24x\)
    • \(-4 \cdot (-9) = 36\)
Step 3: Combine Like Terms

Combine the results from the multiplication:

  • \(3x^3\)
  • \(-18x^2 - 4x^2 = -22x^2\)
  • \(-27x + 24x = -3x\)
  • \(36\)

Final Answer

The simplified expression is: \[ \boxed{3x^3 - 22x^2 - 3x + 36} \]

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