Question

Dada a função f(x) = -2x² - 12, determine f(-2) + f(5)

Answer 1

$f(x) = -2x^2 - 12\\\\f(-2) = -2.(-2)^2 - 12 = -2.4 - 12 = -8 - 12 = -20\\f(5) = -2.5^2 - 12 = -2.25 - 12 = -50 - 12 = -62\\\\f(-2) + f(5) = -20 + (- 62) = -20 - 62 \boldsymbol{= -82}$