Question

write two examples for polynomials with two vảríable​

Answer 1

A polynomial can have:

constants (like 3, −20, or ½)
variables (like x and y)
exponents (like the 2 in y2), but only 0, 1, 2, 3, ... etc are allowed
that can be combined using addition, subtraction, multiplication and division ...

... except ...

... not division by a variable (so something like 2/x is right out)

Answer 2

3y^3 + 2y^2 - 9

-9y^2 -y + 12

here^ indicates power.....