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
Illusion [34]
3 years ago
5

Solve 5x^2-4x-2=0 by completing the square

Mathematics
1 answer:
konstantin123 [22]3 years ago
5 0

Answer:

Hello

Here's the answer:

2x^2 + 5x + 2 = 0\\
2x^2+4x+x+2=0\\
2x(x+2)+1(x+2)=0\\
(2x+1)(x+2)=0\\
x=-\frac{1}{2} \vee x=-2

x^2-4x+1=0\\
x^2-4x+4-3=0\\
(x-2)^2=3\\
x-2 =\sqrt3 \vee x-2=-\sqrt3\\
x=2+\sqrt3 \vee x=2-\sqrt3

Step-by-step explanation:

You might be interested in
If the side of a square is 3/4 feet, what is the area of the square
yuradex [85]

\text{Area of square}=~ \text{Side}^2\\\\~~~~~~~~~~~~~~~~~~~~~=\left(\dfrac 34 \right)^2\\\\~~~~~~~~~~~~~~~~~~~~~=\dfrac{9}{16}~ \text{ft}^2

6 0
3 years ago
Read 2 more answers
Suppose that $1200 is invested at 612%, compounded quarterly. How much is in the account at the end of 5 years?
asambeis [7]

Answer:

\$1,656.50  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=5\ years\\ P=\$1,200\\ r=6\frac{1}{2}\%=6.5\%=6.5/100=0.065\\n=4  

substitute in the formula above

A=1,200(1+\frac{0.065}{4})^{4*5}  

A=1,200(1.01625)^{20}  

A=\$1,656.50  

5 0
3 years ago
Regress smoker on cubic polynomials of age, using a linear probability model. What is the p-value for testing the hypothesis tha
Vlada [557]

The statement " only the estimate intercept is statistically significant at the 5% level is wrong" is wrong about the estimate.

<h3>What is probit regression?</h3>

A probit model is a type of regression in statistics where the dependant variable can only take two values.

We have:

Regress smoker on cubic polynomials of age

If we use linear probability model.

Here the data are missing, but we can say about the estimate that:

Only the estimate intercept is statistically significant at the 5% level is wrong,

Thus, the statement " only the estimate intercept is statistically significant at the 5% level is wrong" is wrong about the estimate.

Learn more about the probit regression here:

brainly.com/question/23389011

#SPJ4

8 0
2 years ago
What is the measure of an interior angle in a regular polygon with 67 sides?
joja [24]
EACH Interior angle = 180 - (360 / number of sides)
EACH Interior angle = 180 - (360 /67)
EACH Interior angle = <span> <span> <span> 174.6268656716 </span> </span> </span>

Source:
http://www.1728.org/polygon.htm


6 0
4 years ago
HERE IS A GOODNIGHT QUESTION :)<br> - what’s something you hate?
nika2105 [10]

Answer:

thanks for points

I hate mercy

hope it helps

8 0
3 years ago
Read 2 more answers
Other questions:
  • What transformation is represented by the rule (x, y)→(−y, x)?
    13·1 answer
  • What is the value of x in the figure below? in this diagram abd cad
    13·2 answers
  • What number is 7/10 more than 0.75​
    11·1 answer
  • A science student wants to study how fast an ant walks which quantity makes the most sense for his study
    14·1 answer
  • Use an algebraic equation to solve the problem. The sides of a triangle are in the ratio 3 : 4 : 5. What is the length of each s
    10·2 answers
  • What is closed and not closed please explain, thank u
    6·1 answer
  • 5,2,4 does this make a triangle
    11·2 answers
  • At birth, a newborn's head is about 25% of its total length. If a baby is 18 inches long, about how many inches is the baby's he
    13·2 answers
  • When the end result is an untrue statement, how many solutions does the equation have?
    9·2 answers
  • Calculate the distance between the points p= (1 "-9" and k = (9 "-3)" in the coordinate plane.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!