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
natulia [17]
3 years ago
11

Solve this quadratic equation using the quadratic formula. 2x 2 - 10x + 7 = 0

Mathematics
2 answers:
Artemon [7]3 years ago
8 0

Answer:

x₁ = <u>5 + √11</u>

         2

x₂ = <u>5 - √11</u>

          2

Step-by-step explanation:

quadratic formula is given by

x = <u>-b ±√b² - 4ac</u>

             2a

a = 2, b = -10, c = 7

x = <u>-(-10) ± √-10² - 4*2*7</u>

                  2*2

x = <u>10 ± √100 - 56</u>

           4  

x = <u>10 ± √44 </u>   = <u>2(5 ± √11)</u>  = <u>5 ± √11</u>

             4                   4               2

x₁ = <u>5 + √11</u>

           2

x₂ = <u>5 - √11</u>

           2

sladkih [1.3K]3 years ago
7 0

Answer:X=11/10

Step-by-step explanation:

2x2-10x+7=0

<u><em>4</em></u>-10x+<u><em>7</em></u>=0

11-10x=0

-10x= -11

Divide both side by -10

-10x/-10.  -11/-10

Answer= 11/10

You might be interested in
What is 12 times 2.5 times 6.25 rounded to the nearest tenth
cricket20 [7]

Answer:

187.5

Step-by-step explanation:

12 × 2.5 × 6.25 = 187.5

6 0
3 years ago
Read 2 more answers
Explain how you know that x^2-8x+20 is always positive. <br> Please help.
IRISSAK [1]

Answer:

if you rearrange to complete the square, you get (x^2-4)^2 +4

and seeing as anything squared will always be positive or zero, the lowest possible value for (x^2-4)^2 is 0, when x = 4

and 0 + 4 = 4, which is greater than 0, so positive

Step-by-step explanation:

4 0
3 years ago
Plss help me with this equation
weeeeeb [17]

Answer:

x = 110 degree

Step-by-step explanation:

Hope this helps u !!

5 0
3 years ago
Wwith
UkoKoshka [18]

Answer: 34 months.

Step-by-step explanation:

10,500 - 2,500 = 8,000.

8,000 divided by 250 = 34. PLEASE GIVE ME BRAINLIEST

8 0
3 years ago
Classify the two given samples as independent or dependent. Sample 1: Pre-training blood pressure of 17 people Sample 2: Post-tr
Damm [24]

Answer:

Sample  1 : independent

Sample  2 :   dependent

Step-by-step explanation:

From the question we are told that

   The  given date is  

                   Sample 1: Pre-training blood pressure of 17 people

                    Sample 2: Post-training blood pressure of 17 people

Now  Sample 1 is independent because  the Pre-training blood pressure of 17 people does not depend of Post-training blood pressure of 17 people

While  

        Sample 2  is  dependent because the Post-training blood pressure of 17 people is  dependent on the Pre-training blood pressure of 17 people

7 0
3 years ago
Other questions:
  • Classify each of the following numbers as real, whole, integer, rational or irrational. Some numbers will have more than one cla
    11·1 answer
  • If –3 + i is a root of the polynomial function f(x), which of the following must also be a root of f(x)?
    15·1 answer
  • For every team competing in a robotics competition, there are 4 students. How many students are on 3 teams?
    15·1 answer
  • Pick the expression that matches this description??
    14·2 answers
  • 98 POINTS AND BRAINLIEST
    6·2 answers
  • Help please I suck at math :(
    9·2 answers
  • Find the value of 8^1/3
    9·2 answers
  • The formula for the area of a square is A=s? where s represents the side length of a square. If the side length of the square is
    9·1 answer
  • A television normally sells for $320. This week, it's on sale at %60 off the normal price. What is the sale price?
    5·2 answers
  • Given that u =&lt; 2,12 &gt;, and z =&lt; -7,5 &gt;
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!