Beth is constructing the circumscribed circle for △abc.

which construction could be her first step?

construct a copy of ∠a that is adjacent to ∠b .

construct the perpendicular bisector of ac .

construct the angle bisector of ∠b .

construct the angle bisector of ∠c .

Construct the perpendicular bisector of AC. 

The correct answer on K12 Quiz is

Construct the perpendicular bisector of AC¯¯¯¯¯ .

thanks Princessanon

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*