Question

Which of the following is a polynomial in two variables?

• A. $xy+5$
• B. $x^2+4x+6$
• C. $x{y}^5+xyz+4$
• D. $y{z}^6+y+3$

Answer 1

Answer: (A), (D)

The correct options are
A $xy+5$
D $y{z}^6+y+3$

The polynomial:
1) $xy+5$ has two variables ; $x,y$
2) $x^2+4x+6$ has only variable ; $x$
3) $x{y}^5+xyz+4$ has three variables ; $x,y,z$
4) $y{z}^6+y+3$ has two variables ; $y,z$