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
borishaifa [10]
2 years ago
12

Solve for x in the equation x squared + 2 x + 1 = 17.

Mathematics
1 answer:
Papessa [141]2 years ago
3 0

Answer:

x = - 1 + \sqrt{17}\\and\\x = - 1 - \sqrt{17}\\

Step-by-step explanation:

given equation

x^2 +2x +1 = 17

subtracting 17 from both sides

x^2 +2x +1 = 17\\x^2 +2x +1 -17= 17-17\\x^2 +2x - 16 = 0\\

the solution for quadratic equation

ax^2 + bx + c = 0 is given by

x = x = -b + \sqrt{b^2 - 4ac} /2a \\\\and \ \\-b - \sqrt{b^2 - 4ac} /2a

________________________________

in our problem

a = 1

b = 2

c = -16

x =( -2 + \sqrt{2^2 - 4*1*-16}) /2*1 \\x =( -2 + \sqrt{4  + 64}) /2\\x =( -2 + \sqrt{68} )/2\\x = ( -2 + \sqrt{4*17} )/2\\x =  ( -2 + 2\sqrt{17} )/2\\x = - 1 + \sqrt{17}\\and\\\\x = - 1 - \sqrt{17}\\

thus value of x is

x = - 1 + \sqrt{17}\\and\\x = - 1 - \sqrt{17}\\

You might be interested in
PLZ HELP ME I DO NOT UNDERSTAND
tekilochka [14]

Answer:

b is the answer

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
7-3x=-4(2+x) pls answer this first correct answer i will mark as brainliest
Zielflug [23.3K]

Answer:

x = -15

Step-by-step explanation:

7 - 3x = -4(2+x)

7 - 3x = -8 -4x

7 + x = -8

x = -15

7 0
3 years ago
A pair of jeans cost $30. There is a 6% sales tax determine the total cost of the jeans
Roman55 [17]
6/100 • 30 = 1.8
1.8 + 30 = 31.8
Answer is $31.8
7 0
3 years ago
(URGENT) need help with this so badly someone help asap
Fynjy0 [20]
The answer for A is 2,026. I set a porportion up which is 77/x = 3.8/100 

The answer to B is 26

8 0
3 years ago
How much can 4 go into 30
Mnenie [13.5K]

Answer:

7.5

Step-by-step explanation:

1) You can start off by dividing 30 by 4

30/4

2) You should get 7.5

4 0
3 years ago
Read 2 more answers
Other questions:
  • In a bouquet of​ flowers, there are 7 daisies and 17 roses. write the ratio of daisies to roses in three different ways.
    6·1 answer
  • -3 (4 - 2y) = 24<br> Solve for "y"<br> Best answer get rewarded <br> Please show work
    15·1 answer
  • 5 2/3 x 4 1/2 make sure your anser is correct
    5·1 answer
  • Help please! I need help with question 3. I don’t know how to start it. I’ll give brainly☺️
    11·2 answers
  • Point P is on line segment OQ. Given OP = 6, OQ = 4x – 3, and PQ = 3x,
    14·2 answers
  • Someone help 6th grade math i will give brainliest
    5·2 answers
  • Stream hala hala by ateez bye
    13·1 answer
  • Jerry played with 3 friends today, all at different times. He played with Tommy for 1 7/8 hours, then Nathan for 1 3/4 hours, th
    15·1 answer
  • Mr. Wilson bought a bag of birdseed and put half of it in his bird feeder. He split the other half equally among his 4 pet birds
    5·1 answer
  • Well has -55.00 in his account if he saves $2.50 his mom gives him lunch every day, how many days will it be until he has a bala
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!