Question

Which one is the quadratic polynomial? A. 3x 2 + 5x B. x +7 C. x 3 + 9 D. √5​

Answer 1

Expert Verified Answer :

A quadratic equation is of the form ax²+bx+c, where a≠0.

Let's check out the options:

A) 3x² + 5x : this is a quadratic equation since it can be written as ax²+bx+c, where a=3≠0, b=5 and c=0

B) x+7 : this is a linear polynomial, since coefficient of a is 0. This can be written as 0x²+x+7

C) x³+9 : This is a cubic polynomial since highest power is 3.

D) √5 : This is a constant and is written as √5 x⁰

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