Practice problem
Which of the following are multivariable polynomials?
5x−4x5x-4x5x−4x
x2y+yx^2y+yx2y+y
3x2+2xy23x^2+2xy^23x2+2xy2
3x2+2x23x^2+2x^23x2+2x2
Type a concept, like “slope” or “photosynthesis”.
