Question

Fungsi f dinyatakan dengan f(x) = 2x2 - 5x). Nilai f(4) - f(-3) pada fungsi tersebut adalah ....

Answer 1

F(x) = 2x²-5x
f(4) = 2(4²)-5(4) = 2(16)-20 = 32-20 = 12
f(-3) = 2(-3)²-5(-3) = 2(9) - (-15) = 18+15 = 33

f(4)-f(-3) = 12-33 = -21