Question

Which one is not a polynomial
(a) 4x² + 2x-1 (b) x²-1
(c) y² + 5y + 1​

Answer 1

Answer:

b is not polynomial...

Step-by-step explanation:

i hope it helps you....

Answer 2

Given:

(a) 4x² + 2x-1 (b) x²-1

(c) y² + 5y + 1

To find:

which one is not a polynomial

Solution :

• A polynomial is an expression that consists of variables and coefficients. Polynomials involve addition , subtraction, multiplication, and non negative integer exponentiation of variables.
• A polynomial may have single or two or three variables.
• A polynomial is arranged from highest degree to lowest for example x³ + 2x² +3x +4

Examples of Polynomials with variable

' x' and y

• x² + 3x + 6
• 4x⁴ -5x³ + 6x² -7x +1
• 7y ³+ 5y² -8y -7
• 2x² - 5 x + 9
• 5x +7

In option (a) 4x² + 2x-1

the degrees to variables are in sequence.

so it is a polynomial.

(c) y² + 5y + 1, As powers to variables are in sequence so it is a polynomial.

(b) x²-1 , there is power two on x and variable with power 1 is missing hence it is not a polynomial.

Hence ( x² - 1) is not a polynomial.

( x² - 1) is not a polynomial.( b) x² - 1 is correct option.