Use a graphing calculator to find the value of f (x) when x = 2 for the function f (x) = x2-5.

-1

f (2) = 2 * 2 - 5 = - 1

but if you meant f (x) = x²-5

its

f (2) = 2²-5 = 4-5 = - 1

it's indeed not the same for all other values of x, for example x=3!

(would really appreciate the brainliest)