Question

Dada a função f(x) = x² - 5x + 6, Calcule o valor de f(5) + f(-2). ​

Answer 1

$f(x)=x^2-5x+6\\\\f(5)+f(-2) = [5^2-5.5+6] + [(-2)^2-5(-2)+6]\\f(5)+f(-2) = [25-5.5+6] + [4-5(-2)+6]\\f(5)+f(-2) = [25-25+6] + [4+10+6]\\f(5)+f(-2) = [6] + [20]\\f(5)+f(-2) = 26$