Question

What is the difference? x/x^2-2x-15 -4/x^2+2x-35 '

a. x^2+3x+12/(x-3(x-5)(x+7)
b. x(x+3-12)/(x+3)(x-5)(x+7)
c. x^2+3x+12/(x+3)(x-5)(x+7)
d. x^2+3x-12/(x+3)(x-5)(x+7)

Answer 1

D!!!

Explanation:

Answer 2

Option D.

Explanation:

The given expression is :
`(x)/(x^(2)-2x-15 ) -(4)/(x^(2) +2x-35)`

Factoring the denominators we have:

`(x)/((x-5)(x+3)) -(4)/((x+7)(x-5))`

Making denominators same and simplifying the fractions we have:

`(x^(2)+7x-4x-12 )/((x-5)(x+3)(x+7)) =(x^(2)+3x-12 )/((x+3)(x-5)(x+7))`

Option D is the right anser.