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Perform the following operation and express in simplest form.

(x^(2)+4x-45)/(3x^(2))÷(x^(2)+6x-27)/(5x)
Answer:

Perform the following operation and express in simplest form.\newlinex2+4x453x2÷x2+6x275x \frac{x^{2}+4 x-45}{3 x^{2}} \div \frac{x^{2}+6 x-27}{5 x} \newlineAnswer:

Full solution

Q. Perform the following operation and express in simplest form.\newlinex2+4x453x2÷x2+6x275x \frac{x^{2}+4 x-45}{3 x^{2}} \div \frac{x^{2}+6 x-27}{5 x} \newlineAnswer:
  1. Factor Expressions: First, we need to factor the numerators and denominators where possible to simplify the expression.\newlineFactor (x2+4x45)(x^2 + 4x - 45) and (x2+6x27)(x^2 + 6x - 27).\newline(x2+4x45)(x^2 + 4x - 45) can be factored into (x+9)(x5)(x + 9)(x - 5).\newline(x2+6x27)(x^2 + 6x - 27) can be factored into (x+9)(x3)(x + 9)(x - 3).
  2. Rewrite with Factored Forms: Now, rewrite the original expression with the factored forms. (x+9)(x5)3x2÷(x+9)(x3)5x\frac{(x + 9)(x - 5)}{3x^2} \div \frac{(x + 9)(x - 3)}{5x}
  3. Take Reciprocal and Multiply: Recall that dividing by a fraction is the same as multiplying by its reciprocal. So, we will take the reciprocal of the second fraction and multiply.(x+9)(x5)3x2×5x(x+9)(x3)\frac{(x + 9)(x - 5)}{3x^2} \times \frac{5x}{(x + 9)(x - 3)}
  4. Cancel Common Factors: Next, we can cancel out any common factors from the numerator and denominator. The (x+9)(x + 9) terms cancel out, and we can simplify the xx terms by dividing 5x5x by 3x23x^2, which leaves us with 53x\frac{5}{3x} in the numerator. (x5)3x×5(x3)\frac{(x - 5)}{3x} \times \frac{5}{(x - 3)}
  5. Multiply Remaining Terms: Now, multiply the remaining terms. [(x5)×5]/[3x×(x3)][\left(x - 5\right) \times 5] / [3x \times \left(x - 3\right)]
  6. Simplify Numerator Multiplication: Simplify the multiplication in the numerator. 5x253x(x3)\frac{5x - 25}{3x(x - 3)}
  7. Final Simplified Form: The expression is now simplified, and we cannot simplify it further because there are no more common factors to cancel out.\newlineThe final simplified form is (5x25)/[3x(x3)](5x - 25) / [3x(x - 3)].

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