Question

A)none B)7 C)6i D)I-6 E) - square of 7 ( look at the picture better)

Answer 1

The correct answer is A). None

Step-by-step explanation:

The given quadratic polynomial has 3 roots and some of roots are x=$\sqrt{7}$ and x=6+i

It is necessary to note that one of the roots is a complex number and root of complex number always in pair of the conjugate to each other.

Since x=6+i

Conjugate of (6+i) is (6-i)

Therefore, (6-i) is 3rd required root of a polynomial

The correct answer is A). None