Use addition to solve the linear system of equations. include all of your work in your final answer.

The 2nd equation changes to -x+y= -4add up the two equations, you will get: 2x=2 x=1 so, y= -3

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 *_*