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
A linear function is graphed below.
Evgen [1.6K]

Answer:

-1\frac{1}{2}

Step-by-step explanation:

We have two coordinate points and are asked to find a slope.

When finding slope, we can use the formula listed :

\frac{y^2-y^1}{x^2-x^1}}

To understand what the variables are, you can take this :

(x^1,y^1)

(x^2,y^2)

Substitute the points :

(-1,4)

(5,-5)

Now substitute it into the formula :

\frac{-5-4}{5-(-1)}

\frac{-3}{2}

-1\frac{1}{2}

4 0
3 years ago
Read 2 more answers
Write each fraction as an expression with negative exponents.
Artemon [7]
The answer is w⁻²/v⁻².

v/w raised to the second power is (v/w)²

(v/w)² = v²/w²

Since xᵃ = 1/x⁻ᵃ, then v²/w² = 1/v⁻²w²

Since 1/xᵃ = x⁻ᵃ, then 1/v⁻²w² = w⁻²/v⁻²
8 0
3 years ago
If y=-4+11 and 3x+y=9 what is the value of y?
liubo4ka [24]

Answer:

y = 7

x = 2/3

Step-by-step explanation:

hope it help

plz follow me

8 0
3 years ago
Read 2 more answers
What are 3 input and output values for the equation y=-x^2+4?
pogonyaev
Here, The function:  y = -x² + 4
Input values would be x coordinates & output values would be y.

When, x = 1, y = (-1)² + 4 = 1 + 4 = 5
x = 2, y = (-2)² + 4 = 4 + 4 = 8
x = 3, y = (-3)² + 4 = 9 + 4 = 13

In short, Your Three input values are: 1, 2, 3
Three Output values are: 5, 8, 13

Hope this helps!
4 0
3 years ago
Please help? I'm. terrible at these
kykrilka [37]
13.5 = 30% of 45
4.5 = 15% of 30
4.6 = 23% of 20
4.2 = 60% of 7

Hope this helps!!
3 0
3 years ago
Other questions:
  • What is the rule for X=2 Y=2
    14·1 answer
  • Help with number 19 please
    10·1 answer
  • The edge of a cube is 4 inches. The area of a cross section perpendicular to one face is ___square inches, and its perimeter is_
    6·2 answers
  • Shayana wants to border her dining room with crown molding. If the room measures 12 feet by 15 feet, how much crown molding will
    11·1 answer
  • A machine in a factor makes 2o gidgets every 1/4 hour. How many gidgets are made every hour ?
    14·1 answer
  • Just select yes and no for all three pls help
    12·2 answers
  • HELLOOOOOOOO
    5·1 answer
  • Which operation would you do first in the following expression 10 - 4 ÷ 1 x 5
    9·2 answers
  • What is a reasonable product of 3 9/10 X 4 1/5
    15·1 answer
  • Find the first 2 equivalent fraction by division (complete all)<br><br>a)9/18<br>b)20/30<br><br>​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!