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
tatyana61 [14]
2 years ago
7

-2x^2+bx -5 Determine the b-value that would ensure the function has two real root.

Mathematics
1 answer:
anastassius [24]2 years ago
8 0

Answer:

  • No solution

Step-by-step explanation:

Given is the quadratic function

  • y = -2x² + bx - 5

In order to have two real roots the discriminant should be posivive

  • D = - b² - 4ac
  • D = - b² - 4(-2)(-5) = - b² - 40

We need D > 0

  • -b² - 40 > 0
  • b² + 40 < 0
  • b² < - 40

There is no solution as b² is never negative

You might be interested in
(11 - 8)3 – 2 x 6<br> What is the answer
torisob [31]

Answer:

15

Step-by-step explanation:

3 0
3 years ago
Solving Quadratic Equations using the Square Root Property
Afina-wow [57]

Answer:

x = -2   or   x = -5

Step-by-step explanation:

You need to complete the square before you can take the square root of both sides.

x^2 + 7x + 10 = 0

Subtract 10 from both sides.

x^2 + 7x = -10

To complete the square, you need to add the square of half of the x-term coefficient to both sides.

The x-term coefficient is 7. Half of that is 7/2. Square it to get 49/4. Now we add 49/4 to both sides of the equation.

x^2 + 7x + \dfrac{49}{4} = -10 + \dfrac{49}{4}

(x + \dfrac{7}{2})^2 = -\dfrac{40}{4} + \dfrac{49}{4}

(x + \dfrac{7}{2})^2 = \dfrac{9}{4}

Now we use the square root property, if

x^2 = k, then

x = \pm \sqrt{k}

x + \dfrac{7}{2} = \pm \sqrt{\dfrac{9}{4}}

x + \dfrac{7}{2} = \pm \dfrac{3}{2}

x + \dfrac{7}{2} = \dfrac{3}{2}   or   x + \dfrac{7}{2} = -\dfrac{3}{2}

x = -\dfrac{4}{2}   or   x = -\dfrac{10}{2}

x = -2   or   x = -5

5 0
3 years ago
What is the product of -6x3y5 and -4y2? A. -24x3y7 B. -24x3y10 C. 24x3y7 D. 24x3y10
Leto [7]

Answer:

C

Step-by-step explanation:

So we have the product of:

(-6x^3y^5)\cdot(-4y^2)

Multiply. Combine like terms:

=(-6\cdot -4)(x^3)(y^5\cdot y^2)

The first term is 24.

The second term stays as it is.

The third term will equate to y^7. Recall how to multiply exponents. The base stays constant and you add the exponents. Thus:

=24x^3y^7

Our answer is C.

And we're done!

5 0
3 years ago
Solve the following inequality, algebra 1. <br><br> will give brainliest answer !!
satela [25.4K]

Answer:

See below

Step-by-step explanation:

r/6 <-6      multiply both sides by 6 to get

<u>r < - 36 </u>

<u />

  <u> or</u>    4r+2 > 18     subtract 2 from both sides of the equation

            4r > 16        divide both sides by 4

            <u>  r > 4 </u>

6 0
2 years ago
Read 2 more answers
Metoda comparației
kozerog [31]

Answer:

Aflam cat costa 1 stilou (38 - 8) : 6 = 30 : 6 = 5 lei

:)

5 0
3 years ago
Other questions:
  • Factor the expression. 8g3 + 10g2 – 12g – 15
    6·1 answer
  • Which interval for the graphed functions has a local minimum of 0
    10·2 answers
  • PLEASEEEE ANSWERRRRR PLEASEE! I WILL MARK BRAINLIESTTTT
    9·2 answers
  • You want to save $20,000 to buy a new boat. You deposit $12,500 in an account earning 6.5% simple interest. After how long will
    11·1 answer
  • Which of the following options is the last step in calculating your net worth? listing your liabilities finding total assets and
    8·2 answers
  • Is 5 a solution to -3x=15
    6·2 answers
  • The circumference of the circle is about ? Inches
    9·1 answer
  • Give an example of an odd function and explain algebraically why it is odd.
    10·1 answer
  • In the coordinate plane, when you move an ordered pair (x,y) to the right, _______
    12·1 answer
  • Use the substitution method
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!