Question

Which expression is not a polynomial?

a. 5x²−4x+1
b. 2−21​x³+x2−x−12
c. 4−3x+5x⁶
d. 8x¹⁰−2x⁵

Answer 1

The expression that is not a polynomial is b. 2−21​x³+x²−x−12.

Step-by-step explanation:

The expression that is not a polynomial is b. 2−21​x³+x²−x−12.

A polynomial is an expression with one or more terms, where each term consists of a constant multiplied by one or more variables raised to non-negative integer powers. In option b, we have a term with a variable raised to the power of 3, which violates the rules of a polynomial. The other options are all polynomials.