Question

Which of the following is not a polynomial
a) 8x ³+ 7x ²- 12x +4
b) 81a²+ 4ab - 9b² - 6
c) a³ - 1/a³+3a² - 3/x²+8
d) x³+y³+z³-3xyz

Answer 1

Answer:

C

Step-by-step explanation:

if any variable is as a denominator ( example:- 1/x) , or has a negative power on it (example:- x^-3) or is in root (example:- √x) then those algebraic expressions are NOT polynomials

in C option, we can see -1/a^3 where denominator is a variable and similarly -3/x^2 where again the denominator is a variable. So, this expression is not a polynomial.

Answer 2

c because it is said that any power of variable should not be in denominator.