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]
3 years ago
12

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

Mathematics
1 answer:
BaLLatris [955]3 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
5.<br> {wawawawawawawawawawawa}
Harrizon [31]

Answer:

35mc

Step-by-step explanation:

7 0
2 years ago
899 round to the nearest ten
algol [13]
900 because 9 is greater than 5 so it rounds to my answer.
6 0
3 years ago
Read 2 more answers
Help now pls bby pls
lions [1.4K]

Answer:

Cities around the country are changing. Faded boards, dull concrete, and old bricks are coming to life. Communities are are turning walls of their buildings, roads, and bridges into colorful murals. Painters might show local scenes, honor a hero or celebrate a culture. Murals can also be great projects for schools. They encourage teamwork, school spirit, and creativity. What would you paint? Your mural could inspire people to recycle, be a volunteer or cheer for a team.

Step-by-step explanation:

there are commas where they are supposed to be

6 0
3 years ago
Read 2 more answers
Can anyone tell me why by direct substitution of x, the equation (circled ones) equals to the indeterminate form, 0/0? When you
Katena32 [7]

Answer:

See explanation and hopefully it answers your question.

Basically because the expression has a hole at x=3.

Step-by-step explanation:

Let h(x)=( x^2-k ) / ( hx-15 )

This function, h, has a hole in the curve at hx-15=0 if it also makes the numerator 0 for the same x value.

Solving for x in that equation:

Adding 15 on both sides:

hx=15

Dividing both sides by h:

x=15/h

For it be a hole, you also must have the numerator is zero at x=15/h.

x^2-k=0 at x=15/h gives:

(15/h)^2-k=0

225/h^2-k=0

k=225/h^2

So if we wanted to evaluate the following limit:

Lim x->15/h ( x^2-k ) / ( hx-15 )

Or

Lim x->15/h ( x^2-(225/h^2) ) / ( hx-15 ) you couldn't use direct substitution because of the hole at x=15/h.

We were ask to evaluate

Lim x->3 ( x^2-k ) / ( hx-15 )

Comparing the two limits h=5 and k=225/h^2=225/25=9.

3 0
3 years ago
How do I find tips and discounts?​
Whitepunk [10]
Well, there are many apps and websites such as Honey to help you. You can also find then on newspapers and magazines where you can find coupons for discounts. And you can find tips in places like BRAINLY like I am doing now.
5 0
3 years ago
Other questions:
  • Going against the current, a boat takes 6 hours to make a 120-mile trip. When the boat travels with the current on the return tr
    6·2 answers
  • Find 2× - 2y + 5z - 2x - y + 3z
    5·1 answer
  • On the school playground, the slide is 12 feet due west of the tire swing and 16 feet due south of the monkey bars. What is the
    13·1 answer
  • Find the area of the shape
    6·1 answer
  • Write a multipication expression that shows <br><img src="https://tex.z-dn.net/?f=%20%7B10%7D%5E%7B5%7D%20" id="TexFormula1" tit
    10·1 answer
  • Equa<br> Solve for c.<br> 4(3+ c)+c= c+4
    7·2 answers
  • Estimate then find the quotient 4.185 divides by 0.93
    6·2 answers
  • HELP PLEASE Which relation is a function of x? ​
    8·1 answer
  • Which equation represents a line with a slope of<br> and a y-intercept of 3?
    8·1 answer
  • GUYS PLEASE ANSWER THIS QUESTION IM DESPERATE
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!