Question

Find f(a + 5).
f(x) = x² + 7

Answer 1

`f(x) = {x}^(2) + 7 \\ \dashrightarrow \: f(a + 5) = {(a + 5)}^(2) + 7 \\ \dashrightarrow \: f(a + 5) = {a}^(2) + 25 + 10a + 7 \\ \dashrightarrow \: \: \boxed{ f(a + 5) = {a}^(2) + 10a + 32}`

hope helpful! :)