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Fully simplify the expression below and write your answer as a single fraction.

(x^(3)-25 x)/(x^(2)+12 x+35)*(x+7)/(x^(4)+9x^(3))
Answer:

Fully simplify the expression below and write your answer as a single fraction.\newlinex325xx2+12x+35x+7x4+9x3 \frac{x^{3}-25 x}{x^{2}+12 x+35} \cdot \frac{x+7}{x^{4}+9 x^{3}} \newlineAnswer:

Full solution

Q. Fully simplify the expression below and write your answer as a single fraction.\newlinex325xx2+12x+35x+7x4+9x3 \frac{x^{3}-25 x}{x^{2}+12 x+35} \cdot \frac{x+7}{x^{4}+9 x^{3}} \newlineAnswer:
  1. Identify factors: Identify the factors in the numerator and denominator that can be factored further.\newlineThe numerator x325xx^3 - 25x can be factored out by taking xx common, resulting in x(x225)x(x^2 - 25).\newlineThe denominator x2+12x+35x^2 + 12x + 35 can be factored into (x+5)(x+7)(x + 5)(x + 7).\newlineThe second fraction's numerator is already simplified as x+7x + 7.\newlineThe second fraction's denominator x4+9x3x^4 + 9x^3 can be factored by taking x3x^3 common, resulting in x3(x+9)x^3(x + 9).
  2. Factor numerator and denominator: Factor the expression x225x^2 - 25 in the numerator, which is a difference of squares.\newlinex225=(x+5)(x5)x^2 - 25 = (x + 5)(x - 5).\newlineNow the expression becomes x(x+5)(x5)(x+5)(x+7)×(x+7)x3(x+9)\frac{x(x + 5)(x - 5)}{(x + 5)(x + 7)} \times \frac{(x + 7)}{x^3(x + 9)}.
  3. Factor expression: Cancel out the common factors in the numerator and the denominator.\newlineThe (x+5)(x + 5) in the numerator cancels with the (x+5)(x + 5) in the denominator.\newlineThe (x+7)(x + 7) in the numerator cancels with the (x+7)(x + 7) in the denominator.\newlineWe are left with x(x5)x3(x+9)\frac{x(x - 5)}{x^3(x + 9)}.
  4. Cancel common factors: Simplify the expression by canceling the common xx terms.\newlineOne xx in the numerator cancels with one xx in the denominator, leaving us with (x5)/x2(x+9)(x - 5) / x^2(x + 9).
  5. Simplify expression: Write the final simplified expression.\newlineThe fully simplified expression is (x5)/(x2(x+9))(x - 5) / (x^2(x + 9)).

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