Which of the following is a polynomial expression in one variable?

4x+2

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4x+2=0

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x+y

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Solution

The correct option is A
4x+2

A polynomial is a mathematical expression of one or more algebraic terms each of which consists of a constant multiplied by one or more variables raised to a non-negative integral power. $(a + b x + c x^{2})$

4x+2 a polynomial expression of degree 1.

$\frac{1}{(x + 1)}$ has a degree of -1, but the polynomial degree is always non-negative. Thus, it is not a polynomial.

4x+2 = 0 is a polynomial equation and not a polynomial expression.

x+y is a polynomial in 2 variables x and y.

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