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Paul [167]
2 years ago
13

Use the Factor Theorem to determine whether x + 1 is a factor of P(x) = 2x³+4x²–2x−8.

Mathematics
1 answer:
Harman [31]2 years ago
5 0

Answer: 2x^2+2x-4-\frac{4}{x+1}

Not a factor because there is a remainder.

Step-by-step explanation:

Let's use synthetic division to solve this..

-1  ║ 2 | 4 | -2 | -8

   ║    | -2| -2 |  4

   ║ 2 | 2|  -4 |  -4

2x^2+2x-4-\frac{4}{x+1}

PS: if anyone knows a better way to do a synthetic division chart please let me know.

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Blank divided by 8= 6 remainder 2
Butoxors [25]

Answer:

50/8 = 6 remainder 2.

Step-by-step explanation:

6 0
3 years ago
PLEASE HELP which of the following identities? Check all that apply
alisha [4.7K]
\sin(x - \pi) = \sin(x) \cos(\pi) - sin(\pi) \cos(x)
via the angle sum formula of sin
since \: cos(\pi) = - 1 \: and \: sin(\pi) = 0 \: then \\ sin(x - \pi) = - sin(x) \: which \: proves \: the \: first \: choice

\cos(x + y) + cos(x - y) = 2 \cos(x) \cos(y) =\:cos(x + y) + cos(x - y)=cos(x) cos(y)-sin(x)sin(y) +cos(x)cos(y)+sin(x)sin(y)=2cos(x)cos(y)
which proves the second choice
the third choice is wrong since for x=0,y=0 it will show that 2=1 which is incorrect
for the fourth one you can do some thing similar to choice one just expand the sum formula of sin and that should be true too
so
the first , the second and the fourth are all true
5 0
3 years ago
Read 2 more answers
I need this answer, please?
Anvisha [2.4K]

Answer:

4.23

Step-by-step explanation:

3.68 + 0.21 + 0.25 + 0.01 + 0.08 = 4.23

4 0
3 years ago
Please help, need to get this done quick!
Murljashka [212]

  our X is 30 because 3x = 90 and if we divide that by 3 then we are left with 30, I knew it was equal to 90 degrees because of the little red box that symbolizes a 90 degree angle.

  So now that we know X = 30 we can plug it in for (2x + 3y)

2(30) + 3y is equal to (60 + 3y) and if we equal that to the other side 3x and plug in for x on that side, we have a new equation of 90 = 60 + 3y so then from here we subtract 60 from both sides and are left with 30 = 3y and finally we divide 3

and our final answer is Y = 10 (((((((((((((((((((((((((((((:

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3 years ago
Please help! 7/20, will give brainliest. I do not tolerate spam answers!
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(X+2)(3x+1) !!!!!!!!!!!!!!!!!!
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