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Perform the following operation and express in simplest form.

(x^(3))/(x^(2)-17 x+72)*(x^(2)-64)/(3x+24)
Answer:

Perform the following operation and express in simplest form.\newlinex3x217x+72x2643x+24 \frac{x^{3}}{x^{2}-17 x+72} \cdot \frac{x^{2}-64}{3 x+24} \newlineAnswer:

Full solution

Q. Perform the following operation and express in simplest form.\newlinex3x217x+72x2643x+24 \frac{x^{3}}{x^{2}-17 x+72} \cdot \frac{x^{2}-64}{3 x+24} \newlineAnswer:
  1. Factor Quadratic Expressions: Factor the quadratic expressions where possible.\newlineWe have the expression (x3x217x+72)×(x2643x+24)(\frac{x^{3}}{x^{2}-17x+72}) \times (\frac{x^{2}-64}{3x+24}). Let's start by factoring the quadratic expressions in the denominators and the numerator where possible.\newlineThe quadratic x217x+72x^2 - 17x + 72 can be factored into (x8)(x9)(x - 8)(x - 9), because 8×9=728 \times 9 = 72 and 8+9=178 + 9 = 17.\newlineThe quadratic x264x^2 - 64 is a difference of squares and can be factored into (x+8)(x8)(x + 8)(x - 8).\newlineThe linear term 3x+243x + 24 can be factored out as 3(x+8)3(x + 8).
  2. Rewrite with Factored Terms: Rewrite the expression with factored terms.\newlineNow we rewrite the original expression using the factored forms:\newlinex3(x8)(x9)×(x+8)(x8)3(x+8)\frac{x^{3}}{(x - 8)(x - 9)} \times \frac{(x + 8)(x - 8)}{3(x + 8)}
  3. Cancel Common Factors: Cancel out common factors.\newlineWe can now cancel out the common factors in the numerator and the denominator:\newlineThe (x8)(x - 8) terms cancel out, and one (x+8)(x + 8) term cancels out.\newlineThis leaves us with:\newlinex3x9×13\frac{x^{3}}{x - 9} \times \frac{1}{3}
  4. Simplify Expression: Simplify the expression.\newlineNow we simplify the expression by multiplying the numerators and denominators:\newlinex3×1(x9)×3\frac{x^{3} \times 1}{(x - 9) \times 3}\newlineThis simplifies to:\newlinex33(x9)\frac{x^{3}}{3(x - 9)}
  5. Check for Further Simplification: Check for any further simplification. There are no common factors left to cancel, and the expression is as simple as it can be.

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