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natita [175]
3 years ago
9

1. Is -7+9=-9+7 true, false , or open?

Mathematics
2 answers:
jeka57 [31]3 years ago
8 0

1. Is B

2. Is C

3. Is C

4. Is A

Tju [1.3M]3 years ago
6 0

1. false

2. idk

3. its C

4. idk

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Expand (x-y)^5 using pascal’s triangle
mina [271]

Hello from MrBillDoesMath!

 

Answer:

x^5 - 5 x^4 y + 10 x^3 y^2 - 10 x^2 y^3 + 5 x y^4 - y^5


Discussion:

Pascal's triangle looks like this (up to 6 rows)

    1  

   1 1  

  1 2 1  

 1 3 3 1  

1 4 6 4 1  

1  5 10 10 5 1


The last row contains the constant multipliers in the equation. The terms in the expansion alternate in sign.


Thank you,

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3 years ago
I WILL MARK BRAINLIST!!
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Answer:

For (2x^2 + 8x - 8), the group is CLOSED as it a polynomial.

Step-by-step explanation:

Here, the given polynomials are:

P(x)=(5x^2+2x-6)\\Q(x)=(3x^2-6x+2)

Now, a group G is said to be <u>CLOSED UNDER SUBTRACTION</u> if,

a and b are he elements of G ⇒ (a-b) is ALSO AN ELEMENT of G

Now, here:

R(x)  = P(x) - Q(x) = (5x^2+2x-6) - (3x^2-6x+2) = (2x^2 + 8x - 8)

or, R(x)  = (2x^2 + 8x - 8)

Also, R(x) is a POLYNOMIAL.

So, R(x) is an Element of group G.

So, the set G of polynomials.

Hence, for the polynomial  (2x^2 + 8x - 8), it will be a polynomial the group is CLOSED.

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