Question

Subtract and simplify​

Answer 1

`\boxed{\bold{(2a-6)/(a^2-4)}}`

Step-by-step explanation:

Apply Rule
`\bold{(a)/(c)\pm (b)/(c)=(a\pm \:b)/(c)}`

=
`\bold{(4a+1-\left(2a+7\right))/(a^2-4)}`

Expand
`\bold{4a+1-\left(2a+7\right): \ 2a-6}`

=
`\bold{(2a-6)/(a^2-4)}`

Mordancy.

Answer 2

D

Step-by-step explanation:

Since the denominators of both fractions are common, then subtract the numerators leaving the common denominator, that is

`(4a+1-2a-7)/(a^2-4)` =
`(2a-6)/(a^2-4)`