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
Svetlanka [38]
2 years ago
12

-2x^2+5x-4=0 , find the discriminant

Mathematics
1 answer:
BaLLatris [955]2 years ago
5 0

Answer:

The discriminant is -7

Step-by-step explanation:

The discriminant of a quadratic function/equation(ax^2+bx+c = 0) is calculated as:

b^2 -4ac

Here

b is the co-efficient of x

a is the co-efficient of x^2

and c is the constant

Given equation is:

-2x^2+5x-4=0

Here

a = -2

b = 5

c = -4

Putting the values in the formula for discriminant

= b^2 - 4ac\\= (5)^2 - 4(-2)(-4)\\= 25 - 32\\=-7

As the discriminant is negative, the equation has no real solution.

Hence,

The discriminant is -7

You might be interested in
Solve for x: -4(3x − 2) = 6x + 2
stepladder [879]

Answer:

x = 1/3

Step-by-step explanation:

-4(3x − 2) = 6x + 2

Distribute

-12x +8 = 6x +2

Add 12x to each side

12x-12x+8 = 6x+2+12x

8 = 18x+2

Subtract 2 from each side

8-2 = 18x+2-2

6 = 18x

Divide each side by 18

6/18 = 18x/18

1/3 =x

4 0
3 years ago
Read 2 more answers
Approximate the real number solution(s) to the polynomial function f(x) = x3 + 2x2 − 5x − 6.
nadya68 [22]
F(1) = (1)^3 + 2(1)^2 - 5(1) - 6 = 1 + 2 - 5 - 6 = -8; x = 1 is not a solution to the polynomial.
f(-1) = (-1)^3 + 2(-1)^2 - 5(-1) - 6 = -1 + 2 + 5 - 6 = 0; x = -1 is a solution to polynomial.
From the options, a or c has x = -1, both has x = , so lets check for x = 3
f(3) = (3)^3 + 2(3)^2 - 5(3) - 6 = 27 + 18 - 15 - 6 = 24; x = 3 is not a solution to the polynomial.
Therefore the solutions to the polynomial are x = -3, x = -1, x = 2
6 0
3 years ago
Which expression is NOT equivalent to −25(3−34)?
Kobotan [32]
Both B and C don’t work
8 0
3 years ago
Read 2 more answers
10 little 3 times 48
nadya68 [22]

Answer:

is it a question or equation?

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Fast please..,..,.,,.,.,.,.,
Vinvika [58]
The word "difference" means "subtract" so B. Wouldn't be B. Because it's adding. This leaves us with A,C, and D

For A. It's a positive one (so this can't be your answer)

For D the negative one is in the front
The question isn't asking the different -1 and -12

So, this leaves us with option C as your answer

Good luck on your assignment and enjoy your day!

~MeIsKaitlyn
7 0
3 years ago
Other questions:
  • Dean describes the data in the histogram as having a cluster from 30–60 and a peak at 40–49. He says the intervals 0–9 and 80–89
    11·2 answers
  • The equation c = start fraction: numerator: 5 denominator: 9: end fraction (f – 32) is used to convert temperature from degrees
    7·1 answer
  • HELP ASAP MARKJNG AS BRAINLIST
    11·1 answer
  • Does anybody know how to make a pie chart out of this
    13·1 answer
  • Which of the following series are convergent?
    10·1 answer
  • Find the area of the circle<br> Pls help quick
    7·1 answer
  • Last year, Clayton picked 86% of the tomatoes in his garden. Jordan picked of the
    13·1 answer
  • 3. Use powers to rewrite these problems:
    13·1 answer
  • How many ways are there to distribute the cookies if there are six choco- late cookies, six oatmeal cookies and six red velvet c
    15·1 answer
  • Use the picture attached.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!