Yes, an expression can have more than one variable.
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Variable expression.
The variable.
Yes, since the expression contains more than one variable, then 2x+5y+2 is a polynomial.
yes it can I've done a few experiments that have had more than one independant variable.
A monomial is an expression that is either:1) a numeral,2) a variable,or 3) the product of a numeral and one or more variables.A variable can be thought of as the product of the numeral 1 and the variable, thus making it a monomial.