Which pairs contain like terms?
6,x
We know that the terms having same literal(variable) coefficient are called like terms .
Since, 6,x not having same literal(variable) coefficients.
Hence, 6,x are not like terms .
which pairs contain like terms?
x,x2
–2xyz,–3x2y2z2
5x,-2x
5x,5y
2xy,-3yx