Question

Dada a fx=x²+7x -8 o vakorde f(5)e igual

Answer 1

f(x) = x^2 + 7x - 8
f(5) = 5^2 + 7 . 5 - 8
f(5) = 25 + 35 - 8
f(5) = 52

Answer 2

Vamos lá :

f(x) = x² + 7x - 8

f(5) = 5² + 7.5 - 8 = 25 + 35 - 8 = 52

Espero ter ajudado !!!