[R] From two polynomials one multivariate

[Alaios]

Hello I have one function that creates polynomials (i.e legendre.polynomials) I want to use this one to create polynomials for variable x and variable y.

legendre.polynomials(2)
[[1]]
1 

[[2]]
x 

[[3]]
-0.5 + 1.5*x^2 

the ideal would be to receive the same output but for another variable (eg. y)

Then having two equation with different x and y I can create the multinomial I want to.

I checked the multipolynom package but it can not do what I am looking for.

Best Regards
Alex