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
Lilit [14]
3 years ago
13

Which quadratic equation has no real roots?

Mathematics
2 answers:
Stella [2.4K]3 years ago
6 0

Answer:

The first choice and the last have no real roots.

Step-by-step explanation:

For an equation to have no real roots the value of the discriminant ( b^2 - 4ac) will be negative.

Working out the values:

1.  D = (-2)^2 - 4* -1*-6 = -20 so it has no real roots.

2. D = (3)^2 - 4*  -2* 4 =  41 so it does have real roots.

3. D = (1)^2 - 4* 2*-6 = 49 so real roots.

4. D =   (-1)^2 - 4* 2*3 = -23 so  no real roots

n200080 [17]3 years ago
3 0

Answer:

A and D

Step-by-step explanation:

By finding the roots of all the equations, we see that options A and D are the only ones that require an imaginary number in order to solve

You might be interested in
The first house on the street has a lawn that is 300 feet long. The second house
Ivanshal [37]

Answer: 450

Step-by-step explanation:

first house--300

second house--50

third house--50 x2=100

300+50+100=450

5 0
3 years ago
Which liner function represents the line given by the points-slope equation y-8=1/2(x-4)?
Gelneren [198K]
<span>y = (1/2)x + 6. hope it helps
</span>
3 0
3 years ago
What percentage of the audience from the 16-25 age group gave the movie a poor rating?
Degger [83]
How many people all together is there ?
8 0
3 years ago
Read 2 more answers
Claire is shopping at a shoe store. The store is having a sale and discounting all shoes by 35% of the marked price. She decides
castortr0y [4]

999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

7 0
3 years ago
What is the 99 times x=4
Musya8 [376]
The answer i x=4/99  (fraction form )

4 0
3 years ago
Read 2 more answers
Other questions:
  • Can someone help me pleaseeeee
    5·1 answer
  • Please help me out!
    9·1 answer
  • 2.<br> Which is the largest of these fractions?<br> A. 7/15<br> B. 4/9<br> C. 6/11
    10·2 answers
  • Write .112112 as a fraction
    15·1 answer
  • If Mike has m pencils and Jen has 3 more pencils than Mike, how many pencils do they have together?
    11·1 answer
  • A regular hexagon is rotated about its center. By which angle could the hexagon be rotated so that its mapped onto itself?​
    14·2 answers
  • A 6 feet tall boy cast a shadow of 9 feet at the same time of day at the shadow of the tree measures 21 feet what is the height
    9·1 answer
  • A manufacturer produces two types of bottled coffee drinks: cappuccinos and cafés au lait. Each bottle of cappuccino requires 6
    9·2 answers
  • PLEASE HELP, MARKING BRAINLIEST!!!!<br><br> If 30/t = 18/r, then t/r =
    15·2 answers
  • Write an equation parallel to x - 2y = 4 that passes through the point (-8, 2).
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!