Q. Add.The numerator should be expanded and simplified. The denominator should be either expanded or factored.x2−12x+369+x2−36x=
Factor denominators: First, we need to factor the denominators of both fractions to see if they can be simplified or if there is a common denominator.The first denominator is x2−12x+36. This is a perfect square trinomial and can be factored as (x−6)2.The second denominator is x2−36. This is a difference of squares and can be factored as (x+6)(x−6).
Write fractions with factored denominators: Now that we have factored both denominators, we can write the fractions with their factored denominators:(9)/(x2−12x+36) becomes (9)/((x−6)2)(x)/(x2−36) becomes (x)/((x+6)(x−6))
Find common denominator: To add these fractions, we need a common denominator. The least common denominator (LCD) is (x−6)2×(x+6).We will rewrite each fraction with the LCD as the denominator.
Rewrite fractions with common denominator: The first fraction already has (x−6)2 in the denominator, so it does not change:(x−6)29The second fraction needs to be multiplied by x−6x−6 to have the LCD as the denominator:(x+6)(x−6)x×x−6x−6=(x−6)2×(x+6)x(x−6)
Add fractions: Now we can add the two fractions with the common denominator: (x−6)29 + (x−6)2∗(x+6)x(x−6)
Combine numerators: Combine the numerators over the common denominator: (x−6)2∗(x+6)9+x(x−6)
Expand and simplify numerator: Expand and simplify the numerator: 9+x2−6x=x2−6x+9
Final simplified form: Now we have the simplified numerator over the common denominator: (x−6)2∗(x+6)x2−6x+9
Final simplified form: Now we have the simplified numerator over the common denominator: (x2−6x+9)/((x−6)2⋅(x+6))We can check if the numerator can be factored further, but it is already a perfect square trinomial, so it cannot be factored further. The final simplified form of the sum is: (x2−6x+9)/((x−6)2⋅(x+6))
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