Q. Add.The numerator should be expanded and simplified. The denominator should be either expanded or factored.x2−3x−42x+5x2−20x3=
Factor denominators: Factor the denominators of both fractions.We need to factor the denominators to find a common denominator for the addition.For the first fraction, the denominator is x2−3x−4, which factors into (x−4)(x+1).For the second fraction, the denominator is 5x2−20x, which can be factored by taking out the common factor of 5x, resulting in 5x(x−4).
Identify LCD: Identify the least common denominator (LCD). The LCD for the fractions is the product of the distinct factors from both denominators, which is 5x(x−4)(x+1).
Rewrite with LCD: Rewrite each fraction with the LCD as the new denominator.For the first fraction, we multiply the numerator and denominator by 5 to get 5x(x−4)(x+1)10x.For the second fraction, we multiply the numerator and denominator by (x+1) to get 5x(x−4)(x+1)3(x+1).
Combine fractions: Combine the fractions over the common denominator.Now we add the two fractions together:(\frac{10x}{5x(x - 4)(x + 1)}) + (\frac{3(x + 1)}{5x(x - 4)(x + 1)})\(\newline= \frac{10x + 3(x + 1)}{5x(x - 4)(x + 1)}\)
Expand and simplify numerator: Expand and simplify the numerator.We distribute the 3 in the second term of the numerator:10x+3(x+1)=10x+3x+3=13x+3
Write final simplified expression: Write the final simplified expression.The final expression is:(5x(x−4)(x+1)13x+3)