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Subtract.
The numerator should be expanded and simplified. The denominator should be either expanded or factored.

(7)/(2x^(2)+18 x)-(5x)/(x^(2)+17 x+72)=

Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline72x2+18x5xx2+17x+72= \frac{7}{2 x^{2}+18 x}-\frac{5 x}{x^{2}+17 x+72}=

Full solution

Q. Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline72x2+18x5xx2+17x+72= \frac{7}{2 x^{2}+18 x}-\frac{5 x}{x^{2}+17 x+72}=
  1. Identify common denominator: Identify the common denominator for the two fractions.\newlineThe denominators are 2x2+18x2x^2 + 18x and x2+17x+72x^2 + 17x + 72. To combine the fractions, we need a common denominator. The common denominator will be the least common multiple (LCM) of the two denominators.
  2. Factor denominators: Factor the denominators if possible.\newlineThe first denominator, 2x2+18x2x^2 + 18x, can be factored by taking out the common factor of 2x2x, which gives us 2x(x+9)2x(x + 9).\newlineThe second denominator, x2+17x+72x^2 + 17x + 72, can be factored into (x+8)(x+9)(x + 8)(x + 9).
  3. Determine LCM of factored denominators: Determine the LCM of the two factored denominators.\newlineThe LCM of 2x(x+9)2x(x + 9) and (x+8)(x+9)(x + 8)(x + 9) is 2x(x+8)(x+9)2x(x + 8)(x + 9), since (x+9)(x + 9) is common in both and we need to include all other distinct factors.
  4. Rewrite fractions with common denominator: Rewrite each fraction with the common denominator.\newlineThe first fraction becomes (72x(x+9))(\frac{7}{2x(x + 9)}) and the second fraction becomes (5x(x+8)(x+9))(\frac{5x}{(x + 8)(x + 9)}). To have the same denominator, we multiply the numerator and denominator of the first fraction by (x+8)(x + 8) and the numerator and denominator of the second fraction by 2x2x.
  5. Multiply numerators by appropriate factors: Multiply the numerators by the appropriate factors.\newlineFor the first fraction, we have (7×(x+8))/(2x(x+8)(x+9))(7 \times (x + 8))/(2x(x + 8)(x + 9)).\newlineFor the second fraction, we have (5x×2x)/(2x(x+8)(x+9))(5x \times 2x)/(2x(x + 8)(x + 9)).
  6. Expand numerators: Expand the numerators.\newlineFor the first fraction, we have (7x+56)/(2x(x+8)(x+9))(7x + 56)/(2x(x + 8)(x + 9)).\newlineFor the second fraction, we have (10x2)/(2x(x+8)(x+9))(10x^2)/(2x(x + 8)(x + 9)).
  7. Subtract second fraction from first fraction: Subtract the second fraction from the first fraction.\newlineNow we have (7x+56)(10x2)2x(x+8)(x+9)\frac{(7x + 56) - (10x^2)}{2x(x + 8)(x + 9)}.
  8. Combine numerators: Combine the numerators.\newlineWe get (7x+5610x2)/(2x(x+8)(x+9))(7x + 56 - 10x^2)/(2x(x + 8)(x + 9)).
  9. Simplify numerator: Simplify the numerator.\newlineWe have (10x2+7x+56)/(2x(x+8)(x+9))(-10x^2 + 7x + 56)/(2x(x + 8)(x + 9)).
  10. Check for possible simplification or factoring: Check for any possible simplification or factoring. The numerator is a quadratic expression and does not factor further in relation to the denominator. Therefore, this is the final simplified form of the expression.

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