Which of the following shows that polynomials are closed under subtraction when polynomial 5x − 6 is subtracted from 3x2 − 6x + 2?

3x2 − 11x + 8 may or may not be a polynomial
3x2 − 11x + 8 will be a polynomial
3x2 − x + 4 may or may not be a polynomial
3x2 − x + 4 will be a polynomial

Question

Which of the following shows that polynomials are closed under subtraction when polynomial 5x − 6 is subtracted from 3x2 − 6x + 2?

 3x2 − 11x + 8 may or may not be a polynomial
 3x2 − 11x + 8 will be a polynomial
 3x2 − x + 4 may or may not be a polynomial
 3x2 − x + 4 will be a polynomial

anonymous · Answer

i think i have the answer, but im not entirely sure

welshfella · Answer

lets subtract
3x^2 - 6x + 2 - (5x - 60
 = 3x^2 - 6x - 5x + 2 + 6

=  ?

welshfella · Answer

* typo  6)  on line 1  -   not 60

anonymous · Answer

i think its either A or B

welshfella · Answer

yes
- but which one shows that polynomials are closed under subtraction

welshfella · Answer

what is 3x^2 - 11x + 8 ?

mizuki · Answer

@Rahammii

welshfella · Answer

Isn't it a p.....?