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
NeX [460]
3 years ago
7

(a) Use the fundamental theorem of algebra to determine the number of roots for 2x^2 + 4x + 7

Mathematics
1 answer:
zysi [14]3 years ago
4 0

Answer:

Step-by-step explanation:

A 2nd order polynomial such as this one will have 2 roots; a 3rd order polynomial 3 roots, and so on.

The quadratic formula is one of the faster ways (in this situation, at least) in which to find the roots.  From 2x^2 + 4x + 7 we get a = 2, b = 4 and c = 7.

Then the discriminant is b^2 - 4ac, or, here, 4^2 - 4(2)(7), or -40.  Because the discriminant is negative, we know that the roots will be complex and unequal.

Using the quadratic formula:

       -4 ±√[-40]         -4 ± 2i√10

x  = ------------------ = ------------------

                4                       4

                                       -2 ± i√10

Thus, the roots are x = ------------------

                                               2

You might be interested in
Someone's quiz grades in the second quarter. (78, 90, 95, 84, 80, 82, 87, 98, 72 ) Find the Median.
jeka57 [31]

Step-by-step explanation:

I believe the answer is 80 cuz it's in the middle

7 0
2 years ago
Read 2 more answers
If 5 men paint a wall in 3hours,
nekit [7.7K]

Answer:20 men

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Two sides of a triangle are 6 m and 7 m. The perimeter of the triangle is 23 m. What's the third side?
mixer [17]
23-6=17
17-7=10
The third side is 10m
8 0
3 years ago
Read 2 more answers
What is one true mathematical statement involving exponents I could make out of 5, 25, and 2?
pentagon [3]

Answer:

5^2 x 2^0 = 25 or 5^2 = 25

Step-by-step explanation:

5^2 = 25

2^0 = 1 (Anything raised to the zero power equals one no matter what the number is)

25 x 1 = 25

8 0
3 years ago
Please help me please
larisa [96]

Answer:

7 pieces

Step-by-step explanation:

Hope it helps.

5 0
2 years ago
Other questions:
  • Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.
    6·2 answers
  • Is millimeter mass or volume? And is quart mass or volume?
    5·1 answer
  • Plz look at the pic !!!!!!!
    6·1 answer
  • 4. The sum of two numbers is 36. Twice the first
    14·1 answer
  • What is 3√45 + 2√ 80−−
    10·1 answer
  • If the ratio of grapes to walnuts to oranges is 6:6:12, how many grapes are there if the total number of fruits is 192?
    6·1 answer
  • Write the equation of the line in slope-intercept form
    15·1 answer
  • Who know this answer to this question
    11·1 answer
  • When you say, "What is the difference between 'a' and 'b'," is 'a' being subtracted by 'b' or is 'b' being subtracted by 'a'?
    12·1 answer
  • A circular railroad-crossing sign has a diameter of 30 inches.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!