Question

Given f(x)=2x²-7x. Find f(-2)

Answer 1

22

Explanation:

To find f(-2), we need to substitute -2 into the expression for f(x)!

Given that f(x) = 2x² - 7x, we substitute -2 for x:

f(-2) = 2(-2)² - 7(-2)

Now we can simplify the expression:

f(-2) = 2(4) + 14

f(-2) = 8 + 14

f(-2) = 22

Therefore, when x = -2, the value of f(x) is 22.

Answer 2

f(- 2) = 22

Explanation:

to find f(- 2) , substitute x = - 2 into f(x)

f(x) = 2x² - 7x , then

f(- 2) = 2(- 2)² - 7(- 2) = 2(4) + 14 = 8 + 14 = 22