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KonstantinChe [14]
3 years ago
11

Under which of the following operations are the polynomials 3x+2 and 4y-11 not closed

Mathematics
1 answer:
musickatia [10]3 years ago
6 0
Lets check all the choices:

A. subtraction:

(3x+2)-(4y-11)=3x+2-4y+11=3x-4y+13

similarly, (4y-11)-(3x+2)=-3x+4y-13

both are polynomials (of 2 variables)

B. (3x+2)(4y-11)=12xy-33x+8y-22, which is a polynomial

C. (3x+2)+(4y-11)=3x+2+4y-11=3x+4y-9, which is a polynomial

D. 
both \frac{3x+2}{4y-11} and \frac{4y-1}{3x+2} are rational expressions in 2 variables, not polynomials



Answer: D

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