Question

Find f(−1) given that f(x)=x3+2x2+3x+4. A. 10 B. -2 C. 2 D. -10

Answer 1

Answer:

The answer is option C

Step-by-step explanation:

f(x) = x³ + 2x² + 3x + 4

To find f(-1) substitute the value of x that's

- 1 into f(x)

That's

$f( - 1) = ({ - 1})^{3} + 2 ({ - 1})^{2} + 3( - 1) + 4 \\ = - 1 + 2(1) - 3 + 4 \\ = - 1 + 2 - 3 + 4 \\ = 1 - 3 + 4$

We have the final answer as

$f( - 1) = 2$

Hope this helps you