Which system of equations can be graphed to find the solution(s) to x^2 = 2x + 3?

It's the  4th choice.
The solutions will be the points of intersection of the 2 graphs.

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 *_*