Q. Simplify the following expression completely.x2−12x+20x2+8x−20Answer:
Identify Factors: Identify the common factors in the numerator and the denominator. To do this, we need to factor both the numerator and the denominator.Factor the numerator: x2+8x−20.We are looking for two numbers that multiply to −20 and add to 8. These numbers are 10 and −2.So, the factored form of the numerator is (x+10)(x−2).
Factor Numerator: Factor the denominator: x2−12x+20. We are looking for two numbers that multiply to 20 and add to −12. These numbers are −10 and −2. So, the factored form of the denominator is (x−10)(x−2).
Factor Denominator: Now, we rewrite the expression with the factored numerator and denominator: (x−10)(x−2)(x+10)(x−2).
Rewrite Expression: Cancel out the common factors. We see that (x−2) is a common factor in both the numerator and the denominator, so we can cancel it out: (x−10)(x+10).
Cancel Common Factors: The expression is now simplified to: (x+10)/(x−10).This is the simplest form of the expression, as there are no common factors left to cancel out.
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