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The numerator should be expanded and simplified. The denominator should be either expanded or factored.

(3)/(x^(2)+8x+16)+(8)/(x^(2)+x-12)=

Add.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline3x2+8x+16+8x2+x12= \frac{3}{x^{2}+8 x+16}+\frac{8}{x^{2}+x-12}=

Full solution

Q. Add.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline3x2+8x+16+8x2+x12= \frac{3}{x^{2}+8 x+16}+\frac{8}{x^{2}+x-12}=
  1. Identify denominators: Identify the denominators of both fractions to determine if they can be factored.\newlineThe first denominator is x2+8x+16x^2 + 8x + 16, which is a perfect square trinomial and can be factored as (x+4)(x+4)(x + 4)(x + 4) or (x+4)2(x + 4)^2.\newlineThe second denominator is x2+x12x^2 + x - 12, which can be factored into (x+4)(x3)(x + 4)(x - 3).
  2. Write fractions with factored denominators: Write the fractions with their factored denominators.\newline(3)/(x2+8x+16)(3)/(x^2 + 8x + 16) becomes (3)/((x+4)2)(3)/((x + 4)^2).\newline(8)/(x2+x12)(8)/(x^2 + x - 12) becomes (8)/((x+4)(x3))(8)/((x + 4)(x - 3)).
  3. Find common denominator: Find a common denominator for the two fractions.\newlineThe least common denominator (LCD) is (x+4)2(x3)(x + 4)^2 \cdot (x - 3).
  4. Rewrite fractions with common denominator: Rewrite each fraction with the common denominator.\newline(3)/((x+4)2)(3)/((x + 4)^2) becomes (3)(x3)/((x+4)2(x3))(3)(x - 3)/((x + 4)^2(x - 3)).\newline(8)/((x+4)(x3))(8)/((x + 4)(x - 3)) becomes (8)(x+4)/((x+4)(x3)(x+4))(8)(x + 4)/((x + 4)(x - 3)(x + 4)).
  5. Combine fractions over common denominator: Combine the fractions over the common denominator.\newline(3)(x3)/((x+4)2(x3))+(8)(x+4)/((x+4)(x3)(x+4))(3)(x - 3)/((x + 4)^2(x - 3)) + (8)(x + 4)/((x + 4)(x - 3)(x + 4)) becomes (3x9+8x+32)/((x+4)2(x3))(3x - 9 + 8x + 32)/((x + 4)^2(x - 3)).
  6. Simplify numerator: Simplify the numerator by combining like terms. 3x9+8x+323x - 9 + 8x + 32 simplifies to 11x+2311x + 23.
  7. Write final simplified fraction: Write the final simplified fraction.\newlineThe sum of the fractions is (11x+23)/((x+4)2(x3))(11x + 23)/((x + 4)^2(x - 3)).