Q. Add.The numerator should be expanded and simplified. The denominator should be either expanded or factored.x2+8x+163+x2+x−128=
Identify denominators: Identify the denominators of both fractions to determine if they can be factored.The first denominator is x2+8x+16, which is a perfect square trinomial and can be factored as (x+4)(x+4) or (x+4)2.The second denominator is x2+x−12, which can be factored into (x+4)(x−3).
Write fractions with factored denominators: Write the fractions with their factored denominators.(3)/(x2+8x+16) becomes (3)/((x+4)2).(8)/(x2+x−12) becomes (8)/((x+4)(x−3)).
Find common denominator: Find a common denominator for the two fractions.The least common denominator (LCD) is (x+4)2⋅(x−3).
Rewrite fractions with common denominator: Rewrite each fraction with the common denominator.(3)/((x+4)2) becomes (3)(x−3)/((x+4)2(x−3)).(8)/((x+4)(x−3)) becomes (8)(x+4)/((x+4)(x−3)(x+4)).
Combine fractions over common denominator: Combine the fractions over the common denominator.(3)(x−3)/((x+4)2(x−3))+(8)(x+4)/((x+4)(x−3)(x+4)) becomes (3x−9+8x+32)/((x+4)2(x−3)).
Simplify numerator: Simplify the numerator by combining like terms. 3x−9+8x+32 simplifies to 11x+23.
Write final simplified fraction: Write the final simplified fraction.The sum of the fractions is (11x+23)/((x+4)2(x−3)).
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