If you have the following function, f ( x )=

Question

If you have the following function, f ( x )= - x ² - 5 x + 4, compute f (3), f (-2), f (5), f (-4). A)f (3)= 0, f (-2)= 21, f (5)= 6, f (-4)= 43 B)f (3)= -2, f (-2)= 18, f (5)= 4, f (-4)= 40 C)f (3)= 1, f (-2)= 20, f (5)= 7, f (-4)= 42 D)f (3)= -1, f (-2)= 19, f (5)= 5, f (-4)= 41 E)f (3)= -3, f (-2)= 16, f (5)= 2, f (-4)= 39

Quizplus · Accepted Answer

By substituting the values into the function: f(3) = -(3)^2 - 5(3) + 4 = -9 - 15 + 4 = -20; f(-2) = -(-2)^2 - 5(-2) + 4 = -4 + 10 + 4 = 10; f(5) = -(5)^2 - 5(5) + 4 = -25 - 25 + 4 = -46; f(-4) = -(-4)^2 - 5(-4) + 4 = -16 + 20 + 4 = 8.