Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

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

(2x)/(x^(2)-3x-18)-(5)/(x^(2)+6x+9)=

Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline2xx23x185x2+6x+9= \frac{2 x}{x^{2}-3 x-18}-\frac{5}{x^{2}+6 x+9}=

Full solution

Q. Subtract.\newlineThe numerator should be expanded and simplified. The denominator should be either expanded or factored.\newline2xx23x185x2+6x+9= \frac{2 x}{x^{2}-3 x-18}-\frac{5}{x^{2}+6 x+9}=
  1. Factor the denominators: First, we need to factor the denominators of both fractions to see if they can be simplified or if there are any common factors.\newlineThe first denominator is x23x18x^2 - 3x - 18. We look for two numbers that multiply to 18-18 and add to 3-3. These numbers are 6-6 and +3+3.\newlineSo, x23x18x^2 - 3x - 18 factors to (x6)(x+3)(x - 6)(x + 3).
  2. Factor the first denominator: The second denominator is x2+6x+9x^2 + 6x + 9. We look for two numbers that multiply to 99 and add to 66. These numbers are +3+3 and +3+3. So, x2+6x+9x^2 + 6x + 9 factors to (x+3)(x+3)(x + 3)(x + 3) or (x+3)2(x + 3)^2.
  3. Factor the second denominator: Now we rewrite the original expression with the factored denominators: (2x)/((x6)(x+3))(5)/((x+3)2)(2x)/((x - 6)(x + 3)) - (5)/((x + 3)^2).
  4. Rewrite the expression with factored denominators: To subtract these fractions, we need a common denominator. The least common denominator (LCD) is (x6)(x+3)2(x - 6)(x + 3)^2.\newlineWe need to multiply the numerator and denominator of the first fraction by (x+3)(x + 3) to have the LCD as the denominator.
  5. Find the least common denominator: After multiplying, the first fraction becomes (2x×(x+3))/((x6)(x+3)2)(2x \times (x + 3))/((x - 6)(x + 3)^2). We expand the numerator: 2x×(x+3)=2x2+6x2x \times (x + 3) = 2x^2 + 6x. So the first fraction is now (2x2+6x)/((x6)(x+3)2)(2x^2 + 6x)/((x - 6)(x + 3)^2).
  6. Multiply the numerator and denominator of the first fraction: The second fraction already has (x+3)2(x + 3)^2 in the denominator, so we only need to multiply the numerator and denominator by (x6)(x - 6) to have the LCD as the denominator.
  7. Expand the numerator of the first fraction: After multiplying, the second fraction becomes (5×(x6))/((x+3)2×(x6))(5 \times (x - 6))/((x + 3)^2 \times (x - 6)). We expand the numerator: 5×(x6)=5x305 \times (x - 6) = 5x - 30. So the second fraction is now (5x30)/((x+3)2×(x6))(5x - 30)/((x + 3)^2 \times (x - 6)).
  8. Multiply the numerator and denominator of the second fraction: Now we can subtract the two fractions since they have the same denominator: \newlineegin{equation}\newline\frac{22x^22 + 66x}{(x - 66)(x + 33)^22} - \frac{55x - 3030}{(x - 66)(x + 33)^22}.\newline\end{equation}
  9. Expand the numerator of the second fraction: Subtracting the numerators gives us: \newline(2x2+6x)(5x30).(2x^2 + 6x) - (5x - 30).\newlineWe distribute the negative sign through the second expression: 5x+30-5x + 30.\newlineNow we combine like terms: 2x2+6x5x+302x^2 + 6x - 5x + 30.
  10. Subtract the two fractions: Combining like terms, we get: 2x2+x+302x^2 + x + 30. So the combined numerator is 2x2+x+302x^2 + x + 30.
  11. Subtract the numerators: The final simplified expression is: \newlineegin{equation}\newline\frac{22x^22 + x + 3030}{(x - 66)(x + 33)^22}.\newline\end{equation}