Which of the following is a quadratic polynomial

# Which of the following is a quadratic polynomial

1. A
$x+2$
2. B
${x}^{2}+2$
3. C
${x}^{3}+2$
4. D
$2x+2$

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### Solution:

Here, we have to find the quadratic polynomial out of given options.
A quadratic polynomial is a kind of polynomial in which the variable’s highest degree is 2.
In option 1), is a linear polynomial because the degree of is $1.$
In option 2), ${x}^{2}+2$ is a quadratic polynomial because the degree of is $2.$
In option 3), ${x}^{3}+2$ is a cubic polynomial as its degree is 3.
In option 4), is a linear polynomial because the degree of is $1.$
So, ${x}^{2}+2$ is the only quadratic polynomial out of the four given polynomials.
Hence, option 2 is correct.

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