Question

Question #e2b91

Answer 1

A matter of "plugging in".

Explanation:

`f(x+2)`
`=2(x+2)^2+4`
`=2(x^2+4x+4)+4`
`=2x^2+8x+4+4`
`=2x^2+8x+8`

`f(x)+f(2)`
`=(2x^2+4)+(2*2^2+4)`
`=(2x^2+4)+(2*4+4)`
`=2x^2+4+8+4`
`=2x^2+16`