1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
disa [49]
2 years ago
8

What are the roots of the function f(x) = x2 + 2x – 1? a. x = ± √ _ 2 b. x = − 1 ± √ _ 2 c. x = 2 ± √ _ 2 d. x = 1 ± √ _ 2

Mathematics
1 answer:
Masteriza [31]2 years ago
7 0

Step-by-step explanation:

Root of the function, where y = 0

f(x) = x² + 2x - 1

0 = x² + 2x - 1

x² + 2x - 1 = 0

x² + 2x = 1

x² + 2x + 1 = 1 + 1

(x + 1)² = 2

x + 1 = ±√2

x = -1 ± √2

Roots → x = -1 ± √2

You might be interested in
The can of tomatoes is three times as tall but one-third as wide as the can of tuna. What is true about the areas of their label
yulyashka [42]
Problem One
Call the radius of the second can = r
Call the height of the second can = h

Then the radius of the first can = 1/3 r
The height of the first can = 3*h

A1 / A2 = (2*pi*(1/3r)*(3h)] / [2*pi * r * h] 

Here's what will cancel. The twos on the right will cancel. The 3 and 1/3 will multiply to one. The 2 r's will cancel. The h's will cancel. Finally, the pis will cancel

Result A1 / A2 = 1/1
The labels will be shaped differently, but they will occupy the same area.

Problem Two
It seems like the writer of the problem put some lids on the new solid that were not implied by the question.

If I understand the problem correctly, looking at it from the top you are sweeping out a circle for the lid on top and bottom, plus the center core of the cylinder. 

One lid would be pi r^2 = pi w^2 and so 2 of them would be 2 pi w^2
The region between the lids would be 2 pi r h for the surface area which is 2pi w h

Put the 2 regions together and you get
Area = 2 pi w^2 + 2 pi w h

Answer: Upper left corner  <<<<< Answer
8 0
3 years ago
О<br> О<br> A only<br> в<br> с<br> A and D
Nataly_w [17]

Answer:

what's the question??

5 0
3 years ago
106 = 4x + 10<br><br>What is the answer to this​
Svet_ta [14]

Answer:

24

Step-by-step explanation:

24 x 4 = 96

96 + 10 = 106

I hope this helps!

3 0
2 years ago
Read 2 more answers
How do you know if two line segments are perpendicular?
Otrada [13]

If two line segments intersect at 90 degrees, then two line segments are perpendicular.

3 0
2 years ago
two cars leave a town at the same time heading in opposite directions. One car is traveling 12 mph faster than the other. After
Art [367]
Divide the mph by 2 232÷2
5 0
3 years ago
Other questions:
  • An i plz get some help
    13·1 answer
  • A rectangular room must have a maximum area of 84 square feet. If the room is to be 8 feet wide, what is the longest the room ca
    14·2 answers
  • If there are 48 students in a school play the ratio of boys to girls is 5:7 how many more girls than boys are in the play?
    10·1 answer
  • 1 Linda is designing a circular piece of stained glass with a diameter of 7 inches. She is going to sketch a square inside the c
    11·1 answer
  • Please help 10 points and I will be ur friend I need help with Geometry bad
    12·1 answer
  • Which of the following is supporting evidence of the given statement?
    14·1 answer
  • Please help I have been stuck this for a while
    6·1 answer
  • Can someone plz help me with this one problem plz!!!
    12·2 answers
  • The points A and B of a rectangle ABCD belong to the graph of the function f(x)=
    11·1 answer
  • ( (-2) ^-3) ^2 Simplify and evaluate where necessary
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!