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fiasKO [112]
2 years ago
5

If the function f (2) 3x2 + bx + 2 has no real roots, which of the following could be the value of b? -7, -1, 8, 0

Mathematics
1 answer:
lina2011 [118]2 years ago
3 0

Answer:

b could be -1 or 0

Step-by-step explanation:

f(x) = 3x^2 +bx+2

if it has no real roots, the discriminant must be less than zero

b^2 -4ac <0

a=3  b=b  c=2

b^2 - 4(3)(2) <0

b^2 - 24 <0

b^2 < 24

Taking the square root of each side

b< 2 sqrt(6)  and b > 2 sqrt(6)

b could be -1 or 0

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3 years ago
Find the sum of 10 + 5i and its complex conjugate.<br> Write your answer in the form a + bi
gogolik [260]

Answer:

20.

Given, complex number is 10+5i .

We need to find sum of the given complex number and its conjugate. The conjugate of 10+5i is 10-5i. Therefore, the sum will be 10+5i+10−5i=20.

7 0
2 years ago
Order of operations with integers<br><br> Please help solve with steps:<br><br> 3+4 x (-5)
lilavasa [31]

Answer:

-17

Step-by-step explanation:

3 + 4(-5)

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Hope this helps!

5 0
3 years ago
Read 2 more answers
Help me get the possible point, no link or virus please.
matrenka [14]

Answer:

k(x) = -40

i(x) = -15

n(x) = 71

d(x) = 17

Step-by-step explanation:

This is exactly the same deal as the most recent question you asked.

"Evaluate each function for x = 8". In other words, this is saying, calculate the result for each function, replace x with 8. So, that means for every function, you are going to replace x with 8.

k(x) = -5x turns into k(x) = -5(8)

Then you just solve, -5(8) = -40

Since I have answered this question similarly, I ask that you go back to the answer and detailed explanation I gave you earlier.

6 0
2 years ago
Marking people as BRAINLIST
Gnesinka [82]

Answer:

66

Step-by-step explanation:

57 x 2= 114

180-114= 66

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2 years ago
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