Question

Please please need help on these two

Answer 1

( f + g ) (x) =
`2 x^(2)  + x - 4`

g(x) - f(x) =
`x^(2)  - 2 x - 4`

Explanation:

1. f(x) = 4 x - 4 and g(x) =
   `2 x^(2) - 3 x`

( f + g ) (x) = f(x) + g(x)

=
`4 x - 4 + 2  x^(2)  - 2 x`

=
`2 x^(2) + x -4`

2. g(x) =
`x^(2)  + 1` and f(x) = 2 x + 5

g(x) - f(x) =
`x^(2)  + 1 - (2 x + 5)`

=
`x^(2)  + 1 - 2 x - 5`

=
`x^(2)  - 2 x - 4`