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
Svetradugi [14.3K]
3 years ago
8

Solve by Completing the Square x^2 + 8x – 2 = 0

Mathematics
1 answer:
Bingel [31]3 years ago
3 0

x^2+8x  ____  = 2

x^2+8x+16=2

(x+4)^2 =2

Square root both sides

x+4=square root of (2)

subtract four form both sides

x= square root of (2) - 4

You might be interested in
What is 63= 9k;6,7,8
OLEGan [10]
63 = 9k 

divide by 9 on each side to get k by itself 

k = 7
4 0
3 years ago
If T=[23 -38]<br> [17 -6 ]<br> then what is –10(T)?<br> PLEASE HELP
andrew-mc [135]

Answer:

B

Step-by-step explanation:

Multiply each term by -10

8 0
2 years ago
Express p in terms of q if
Irina-Kira [14]

p=x^2+\dfrac{1}{x^2}\\\\p=\dfrac{x^4}{x^2}+\dfrac{1}{x^2}\\\\p=\dfrac{x^4+1}{x^2}\qquad(*)

q=x+\dfrac{1}{x}\\\\q=\dfrac{x^2}{x}+\dfrac{1}{x}\\\\q=\dfrac{x^2+1}{x}\qquad\text{square both sides}\\\\q^2=\left(\dfrac{x^2+1}{x}\right)^2\\\\q^2=\dfrac{(x^2+1)^2}{x^2}\qquad\text{use}\ \ (a+b)^2=a^2+2ab+b^2\\\\q^2=\dfrac{(x^2)^2+2(x^2)(1)+1^2}{x^2}\\\\q^2=\dfrac{x^4+2x^2+1}{x^2}\\\\q^2=\dfrac{x^4+1}{x^2}+\dfrac{2x^2}{x^2}\\\\q^2=\dfrac{x^4+1}{x^2}+2\qquad\text{subtract 2 from both sides}\\\\q^2-2=\dfrac{x^4+1}{x^2}\\\\\text{From (*) we have}\\\\\boxed{p=q^2-2}

8 0
2 years ago
HI HELP ITS A QUIZZZ!
Virty [35]
B. Its suggesting something bigger than -5
4 0
3 years ago
Li keeps track of the time he spends working out each week. The table shows the number of cardio workouts and the number of weig
Dmitry [639]

Step-by-step explanation:

1)X represents the time he spent in cardio.

Y represents the time he spent in weighted.

2)If you could put the options on the second one it would be better.

3)4x+y=210

3x+2y=195

y=210-4x

3x+2(210-4x)=195

3x+420-8x=195

5x=420-195

5x=225

x=45

y=30

Total time of one cardi and weighted = 75min= 5/4 h.

4)2x+4y=

90+120=210 total time of week three.

4 0
3 years ago
Read 2 more answers
Other questions:
  • Georgia has 9 meters of ribbon and wants to make 80 spirit ribbons that are each 12 cm long. Does she have enough ribbon?
    9·2 answers
  • To obtain the length of an arc, what fraction is multiplied by the circumference of a circle (C = 2πr)?
    7·2 answers
  • Find the equation of the line through point (2,−4) and parallel to −6x+2y=4. Use a forward slash (i.e. "/") for fractions (e.g.
    15·1 answer
  • How best to find what percent<br> $ 7.00 is of $18.25
    6·1 answer
  • F(x)=-7x2+8x+2 how many x-intercepts does the graph of f have
    13·1 answer
  • 10x - 9y = 24 i need help solvinv for y and i need the work to see what i be doing wrong .
    12·1 answer
  • The average person lives for about years. Does the average person live for at least hours? (Hint: There are days in each year an
    11·1 answer
  • Now there is a door whose height is more than its width by 6 chi 8 cun. The distance between the [opposite] corners is 1 zhang.
    7·1 answer
  • ABCD is a quadrilateral such that the measures of three of its interior angles are given as B=122 degrees, C= 75 degrees, D= 51
    14·1 answer
  • A triangle has side lengths that are 8 cm, 15 cm, 17 cm. Is this a right triangle?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!