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
Usimov [2.4K]
3 years ago
12

A quadratic equation is shown below:

Mathematics
1 answer:
AfilCa [17]3 years ago
5 0

the solutions to a general quadratic equation is

X=-b±√b²-4ac/2a  ,, When ax²+bx+c=0

the discriminant is the expression under the radical b²−4ac

Part A:

discriminant is (-16)² - 4(9)(60) = -1904

there are two complex solutions  

Part B:  

4x² + 8x − 5 = 0

4x² + 10x -2x - 5=0

2x ( 2x + 5) - 1(2 x + 5) =0  

(2x + 5)(2x-1) = 0

      /                     \

    /                          \

2x+5 = 0                 2x-1 =0    

x = -5/2                     x = 1/2

You might be interested in
HELP PLEASE................
DerKrebs [107]
Its the first one because wen you do this it is a= pi x r^2 x h
7 0
3 years ago
Read 2 more answers
Help on this complete the square problem.<br><br><br><img src="https://tex.z-dn.net/?f=x%5E2%2B3x%2B7" id="TexFormula1" title="x
Lesechka [4]
X2+3x+7=0 that’s the answer
6 0
3 years ago
Just a simple question (that I can't even answer)
Elina [12.6K]

Answer:

53

Step-by-step explanation:

Hope this help you...but if it's not,im so sorry

6 0
3 years ago
Read 2 more answers
Lim x→π/2 1-sinx/cot^2x<br>any genious help please ​
Simora [160]

Rewrite the limand as

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = (1 - sin(<em>x</em>)) / (cos²(<em>x</em>) / sin²(<em>x</em>))

… = ((1 - sin(<em>x</em>)) sin²(<em>x</em>)) / cos²(<em>x</em>)

Recall the Pythagorean identity,

sin²(<em>x</em>) + cos²(<em>x</em>) = 1

Then

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = ((1 - sin(<em>x</em>)) sin²(<em>x</em>)) / (1 - sin²(<em>x</em>))

Factorize the denominator; it's a difference of squares, so

1 - sin²(<em>x</em>) = (1 - sin(<em>x</em>)) (1 + sin(<em>x</em>))

Cancel the common factor of 1 - sin(<em>x</em>) in the numerator and denominator:

(1 - sin(<em>x</em>)) / cot²(<em>x</em>) = sin²(<em>x</em>) / (1 + sin(<em>x</em>))

Now the limand is continuous at <em>x</em> = <em>π</em>/2, so

\displaystyle\lim_{x\to\frac\pi2}\frac{1-\sin(x)}{\cot^2(x)}=\lim_{x\to\frac\pi2}\frac{\sin^2(x)}{1+\sin(x)}=\frac{\sin^2\left(\frac\pi2\right)}{1+\sin\left(\frac\pi2\right)}=\boxed{\frac12}

4 0
3 years ago
A 3 mL sample of a liquid has a mass of 3 g. What is the density of this liquid?
Phoenix [80]
The density of the liquid is 1g/mL
8 0
3 years ago
Other questions:
  • F(x)=-10x2+500x+7615
    5·1 answer
  • What is the prime factorization for 180?
    7·1 answer
  • Which graph shows the solution to the inequality 3x-7&lt;20 ?
    6·1 answer
  • Each case of cookies at a baking company has 27 boxes. Each box contains 9 cookies How many cookies are in each case?
    6·1 answer
  • The path of a football kicked by a field goal kicker can be modeled by the equation y = –0.04x2 + 1.56x, where x is the horizont
    9·2 answers
  • At a local pizza place, the cost of a large cheese pizza is $13.99. Each additional topping is $1.25. Is the data in this situat
    15·1 answer
  • Bobbi is maintaining a campfire. She has kept the fire steadily
    5·1 answer
  • Write two equivalent expressions involving<br> decimals that illustrate the Distributive Property.
    12·1 answer
  • Plz help!! Math isn’t my thing. I’ll give brainliest.
    10·1 answer
  • Find the slope of each.1. (0, 4) and (2, -3)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!