Q. Simplify the following expression completely.x2−12x+35x2−x−42Answer:
Factorize numerator: Factor the numerator and the denominator.The numerator x2−x−42 and the denominator x2−12x+35 are both quadratic expressions that can be factored into the product of two binomials.
Factorize denominator: Factor the numerator x2−x−42. To factor the quadratic expression, we look for two numbers that multiply to −42 and add to −1. These numbers are −7 and 6. So, x2−x−42=(x−7)(x+6).
Simplify expression: Factor the denominator x2−12x+35. To factor the quadratic expression, we look for two numbers that multiply to 35 and add to −12. These numbers are −5 and −7. So, x2−12x+35=(x−5)(x−7).
Simplify expression: Factor the denominator x2−12x+35. To factor the quadratic expression, we look for two numbers that multiply to 35 and add to −12. These numbers are −5 and −7. So, x2−12x+35=(x−5)(x−7). Simplify the expression by canceling out common factors. We have (x−7)(x+6) in the numerator and (x−5)(x−7) in the denominator. The common factor (x−7) can be canceled out from both the numerator and the denominator. So, the simplified expression is (x+6)/(x−5).
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