Question

Can someone help... 2 algebra questions :)
medal + fan

Answer 1

Sorry Im back

Answer 2

the first one :)

Answer 3

multiply them together, and see which one you get
the rest of the question about "closure" is idiotic

Answer 4

thats correct ,
closure under an operation means if a, b are in the set, then a*b is in the set

Answer 5

mkay... then is it C

Answer 6

natural numbers are not closed under subtraction, but \(12-3=9\)
it demonstrates nothing

Answer 7

I know its either C or D

Answer 8

amirite?

Answer 9

polynomials are 'closed' under multiplication , (not under division)

Answer 10

the point of this exercise is to show that when two polynomials are multiplied, you get another polynomial .

Answer 11

the fact that any two specific polynomials when multiplied together give another polynomial demonstrates nothing at all

Answer 12

it gives you evidence that it may be closed

Answer 13

to prove that it is closed you have to show that any two polynomials , when multiplied, produce another polynomial

Answer 14

given any two*

Answer 15

in any case, it is not C or D

Answer 16

NONONO... its A

Answer 17

because 6*8=48 amirite?

Answer 18

yes

Answer 19

aaand,,, it is a polynomial...

Answer 20

thanks guys... do you want to help on another?

Answer 21

for example 2 and 3 are positive integers, and 2*3 is a positive integer. this demonstrates closure under multiplication for positive integers

Answer 22

thanks :)

Answer 23

you are really good at this... teacher? student?

Answer 24

secret

Answer 25

hmmm... alright :) do you want to help on another?

Answer 26

so here is a fun problem, show that polynomials are not closed under division

Answer 27

so here you can do a counterexample.

Answer 28

can you help?

Answer 29

Let your first polynomial be 1, and you second polynomial be x.

But 1/x is not a polynomial

Answer 30

so here area = base x height

Answer 31

(2x-4)(x+5)

Answer 32

ok... gimme a sec