All categories

3 years ago

If f(x) = x^3-2x, find f(-2).

Mathematics

2 answers:

kaheart [24]3 years ago

8 0

Answer:

f(-2) = -4

Step-by-step explanation:

f(x) = x^3-2x,

Let x = -2

f(-2) = (-2)^3 - 2(-2)

= -8 +4

= -4

n200080 [17]3 years ago

3 0

Answer:

The correct/valid answer is f(-2) = -4

Step-by-step explanation:

><><><><><><<><><><><><

Step 1:

f(x) = x^3-2x,

Step 2: Determine what x will be

x will be = -2

Step 3: Multiply by -2

f(-2) = (-2)^3 - 2(-2)

Step 4: Solve the equation

= -8 +4

= -4

Final answer: f(-2) = -4

><><><><><><><><><><><><

Mark as brainlies please, i need a few more :D

You might be interested in

What does 9/5 equals to ?

goldenfox [79]

Answer:

9/5 = 1.8

All you have to do is divide the numerator by the denominator.

Hope this helps!

-Mikayla

8 0

4 years ago

Read 2 more answers

What is the x in 5x−3+2(x+4)

8090 [49]

5x-3+2(x+4) solve for x
=5x - 3 +2x + 8
= 7x + 5
so 7x = -5
x = -5/7

6 0

4 years ago

A store sells a 1 1/4 pound package of turkey for $9 what is the unit price of the turkey in the package?

Brilliant_brown [7]

Answer:

$7.2/lb

Step-by-step explanation:

9/1.25= 7.2

6 0

3 years ago

5. To get to the library from his house, Robert biked 6 kilometers due east and then

AURORKA [14]

Answer:

24 kilometers.

Step-by-step explanation:

The shortest path between two points is a straight segment that connects the two points.

Refer to the diagram attached. The 6-km segment and the 8-km segment are normal to each other. Together with the segment that joins the library and the house, the three segments now form a right triangle.

The two shorter segments are the two legs, and
The longer segment that joins the library and the house is the hypotenuse.

The length of the hypotenuse can be found with the Pythagorean Theorem.

$\begin{aligned}\text{Hypotenuse} &= \sqrt{(\text{Leg 1})^{2} + (\text{Leg 2})^{2}}\\&= \sqrt{6^{2} + 8^{2}}\\&= \sqrt{36 + 64} \\&= \sqrt{100}\\&= \rm 10\;km\end{aligned}$ .