F (x) = 2x^2 + 5x - 17, find f (-1).

Question

Marley Jarvis

Mathematics

2 May, 01:00

F (x) = 2x^2 + 5x - 17, find f (-1).

+1

Answers (2)

Know the Answer?

Krista Morales · Answer 1

-20

Step-by-step explanation:

f (x) = 2x² + 5x - 17

Put x as - 1.

f (-1) = 2 (-1) ² + 5 (-1) - 17

Solve for the powers.

f (-1) = 2 (1) + 5 (-1) - 17

Multiply the terms.

f (-1) = 2 + - 5 - 17

Add or subtract the terms.

f (-1) = - 20

Talia · Answer 2

-20

Step-by-step explanation:

f (x) = 2x^2 + 5x - 17,

f (-1)

Let x = - 1

f (-1) = 2 * (-1) ^2 + 5 (-1) - 17

= 2 * 1 - 5 - 17

= 2 - 22

= - 20