3x(2x-7y)-8x(x+2y)+2y(4x-y) I’m confused, I thought the answer was -2x^2-29xy-2y^2
But that’s not one of the available answers

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 *_*