Evaluate the following function for the given value of x.

Question

f(x) = 2x2-x+3
Find f(-4)
a) 39
b) -9
c) 71
d) 31

Answer 1

To find f(-4), substitute -4 in place of x in the function f(x):

f(-4) = 2(-4)^2 - (-4) + 3
= 2(16) + 4 + 3
= 32 + 4 + 3
= 39

So, f(-4) = 39.

The correct answer is a) 39.