Evaluate |x| + (-2x 2) for x = 3.

Question

asked Jun 17, 2020 150k views

1 Answer

Dylan Meivis · Answer 1 · 2020-06-22T22:28:04+0000

The answer is:

f(3)=|x|+(-2x^(2))=-15

Evaluating a function means replacing the variable with the given value (3 for this case).

To evaluate the function, we need to remember that the absolute value guarantees a possitive value, for example:

$|-3|=3\\|-4|=4$

So, we are given the function:

f(x)=|x|+(-2x^(2))

Then, evaluating we have:

f(3)=|3|+(-2*(3)^(2))=3+(-2*9)=3-18=-15

Hence, the answer is:

f(3)=|x|+(-2x^(2))=-15

Have a nice day!