Question

If f(x)=-5x^2-3x+4 what is the value of f(-1)
A:12
B:-2
C:2
D:-12
E:10

Answer 1

C: 2

Explanation:

To find the value of f(x) at x=-1, we can simply substitute -1 for x in the equation f(x)=-5x²-3x+4.

f(-1) = -5(-1)² - 3(-1) + 4

f(-1) = -5 + 3 + 4

f(-1) = 2

Therefore, the value of f(x) at x=-1 is C: 2

Answer 2

C

Explanation:

to evaluate f(- 1) , substitute x = - 1 into f(x)

f(x) = - 5x² - 3x + 4 , then

f(- 1) = - 5(- 1)² - 3(- 1) + 4 = - 5(1) + 3 + 4 = - 5 + 7 = 2