Question

Which of the following are not quadratic polynomials?
(i) $3+4x–7x^2$

(ii) $8x^2–15$

(iii) 6x – 15

(iv) $4x^3–3x$

• A. $3+4x–7x^2$
• B. $8x^2–15$
• C. 6x – 15
• D. $4x^3–3x$

Answer 1

Answer: (C), (D)

The correct options are
C

6x – 15

D

$4x^3–3x$

i) $3+4x–7x^2$ is a polynomial of degree 2, so it is a quadratic polynomial.

ii) $8x^2–15$ is a polynomial of degree 2, so it is a quadratic polynomial.

iii) 6x – 15 is not a polynomial of degree 2, so it is not a quadratic polynomial.

iv) $4x^3–3x$ is a polynomial of degree 3, so it is not a quadratic polynomial.