Question

calcule o valor numerico da expressão algébrica:
x2-9/x+1 + x2-4x+4/2para x=4

Answer 1

f(4) = x^2 - 9/(x+1) + x^2 - 4 + 4/2
(4)^2 - 9/(4+1) + 4^2 - 4 + 4/2 =
16 - 9/5 + 16 - 4 + 4/2 =
28 - 9/5 + 2 =
26 - 9/5 =
130/5 - 9/5 =
121/5

f (4) = 121/5