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
Ksenya-84 [330]
3 years ago
7

Which quadratic equation has roots-8 + 3i and -8 - 3i?

Mathematics
1 answer:
marusya05 [52]3 years ago
7 0

The two roots are

\alpha = -8+3i,~~~ \beta = -8-3i\\\\\\x^2 - (\alpha + \beta)x + \alpha \beta = 0\\\\\implies x^2 - (-8+3i-8-3i)x + (-8+3i)(-8-3i)=0\\\\\implies x^2 +16x + (-8)^2+3^2 =0\\\\\implies x^2 +16x +64+9=0\\\\\implies x^2 +16x +73

Hence the answer is D.

You might be interested in
I need help with this
vodka [1.7K]
X=5 if you solve the equation 20=8x/2
7 0
3 years ago
Mrs Brown and Mrs Jones make 4 dozen sandwiches in half an hour in Mrs Jones’ small kitchen. If they had 30 friends in to help,
Pepsi [2]

Answer:

1488 sandwiches in thirty minutes

Step-by-step explanation:

5 0
3 years ago
Which graph shows a system with no solutions?
Olenka [21]
The answer is graph B because the lines never intersect; they are parallel lines.
8 0
3 years ago
Read 2 more answers
C) Work out<br> 2.9 x 105 * 7.2 x 102<br> (Over) 5 x 10-8
Zepler [3.9K]

Answer: 417,600,000,000,000

Step-by-step explanation: 2.9(10)^5(7.2)(10^2)/5(10^-8)

                                             (2.9)(100,000)(7.2)(10^2)/5(10^-8)

                                             (290,000)(7.2)(10^2)/5(10^-8)

                                             2,088,000(10^2)/5(10^-8)

                                             (2,088,000)(100)/5(10^-8)

                                             208,800,000/5(10^-8)

                                             208,800,000/5(1/100,000,000)

                                             208,800,000/1/20,000,000

                                             417,600,000,000,000

6 0
4 years ago
Solve as a fraction in lowest terms 1/4 + 5/6
34kurt

Answer:

1 1/12

Step-by-step explanation:

1/4=3/12

5/6=10/12

10/12+3/12=13/12=1 1/12

3 0
2 years ago
Other questions:
  • Evaluate sine squared theta for theta equals 45 degrees ​
    10·1 answer
  • The volume of a rectangular pyramid is 3 cubic inches. What is the volume of a rectangular prism with the same length, width, an
    6·1 answer
  • Please help!
    7·1 answer
  • What's the greatest common factor of 945 and 3675
    15·2 answers
  • find the probability that a data value picked at random from a normally distributed population will have a standard score that c
    12·1 answer
  • 2/4 = 1/2 or 1/3 <br> which is the answer
    13·2 answers
  • What is the simplified form of 45? <br> A. 5 <br> B. 9.5 <br> C. 3/5 <br> D. 5/3
    5·2 answers
  • Charlie is 3 feet tall and has a 6.5 foot shadow. He is standing next to a 6-foot tall fence post. Find the length of
    8·1 answer
  • Pls help me! I’m so confused on how to do this my teacher isn’t the best at explaining math… I need #4 a,b,c,d answers. Again pl
    10·1 answer
  • Annie has 5 green and 4 purple shirts for a total of 9 shirts. They each have two buttons. How many buttons does she have total?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!