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Simplify the following expression completely.

(x^(2)-x-42)/(x^(2)-12 x+35)
Answer:

Simplify the following expression completely.\newlinex2x42x212x+35 \frac{x^{2}-x-42}{x^{2}-12 x+35} \newlineAnswer:

Full solution

Q. Simplify the following expression completely.\newlinex2x42x212x+35 \frac{x^{2}-x-42}{x^{2}-12 x+35} \newlineAnswer:
  1. Factorize numerator: Factor the numerator and the denominator.\newlineThe numerator x2x42x^2 - x - 42 and the denominator x212x+35x^2 - 12x + 35 are both quadratic expressions that can be factored into the product of two binomials.
  2. Factorize denominator: Factor the numerator x2x42x^2 - x - 42. To factor the quadratic expression, we look for two numbers that multiply to 42-42 and add to 1-1. These numbers are 7-7 and 66. So, x2x42=(x7)(x+6)x^2 - x - 42 = (x - 7)(x + 6).
  3. Simplify expression: Factor the denominator x212x+35x^2 - 12x + 35. To factor the quadratic expression, we look for two numbers that multiply to 3535 and add to 12-12. These numbers are 5-5 and 7-7. So, x212x+35=(x5)(x7)x^2 - 12x + 35 = (x - 5)(x - 7).
  4. Simplify expression: Factor the denominator x212x+35x^2 - 12x + 35. To factor the quadratic expression, we look for two numbers that multiply to 3535 and add to 12-12. These numbers are 5-5 and 7-7. So, x212x+35=(x5)(x7)x^2 - 12x + 35 = (x - 5)(x - 7). Simplify the expression by canceling out common factors. We have (x7)(x+6)(x - 7)(x + 6) in the numerator and (x5)(x7)(x - 5)(x - 7) in the denominator. The common factor (x7)(x - 7) can be canceled out from both the numerator and the denominator. So, the simplified expression is (x+6)/(x5)(x + 6)/(x - 5).

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