Question

Evaluate g(n-5) if g(x) =
`(x^2 - 6)/(2x)`

A
`(n^2 - 5)/(2n-20)`
B
`(n^2-6)/(2n) -5`
C
`(n^2-10n+19)/(2n-10)`
D
`(n^2-10n+19)/(2n-5)`

Answer 1

The only choice with the correct denominator is

`\bf C.\quad(n^2-10n+19)/(2n-10)`

_____

For multiple choice questions, it works well to eliminate answers that cannot possibly be right, then look at what remains. Here, only one answer remains.