Help Please. I am stuck

Question

Can you please tell me which equation is a polynomial. There is more than 1.

 

x4+x^3 √7+2x^2−3√/2x+π

 

x4+5/x3−√x+8

 

x3−4x−3

 

|x|2+4x√−2−x5+7x−12x2+9

 

4/x2−4x+3

 

 

Thank you, I really appreciate it.

Answer 1

A polynomial is not required to be an equation.  No equal sign is needed to define what makes a polynomial.

A polynomial can have constants, variables and exponents,
but never division by a variable (i.e. variables with negative exponents).

 

All exponents must be in the {0, 1, 2, 3, ....}

No dividing by variables, no fractional exponents..

 

x³ - 4x - 3   IS a polynomial

 

Can you retype that first one: x4+x^3 √7+2x^2−3√/2x+π

It looks like you may have a variable in a denominator in −3√/2x

but there is a typo of some sort there.

 

The others are definitely NOT polynomials because there are

fractional exponents such as √x which is x^1/2 , variables in denominator,

and, also |x| is not allowed.