Cho hình thang ABCD Có AB//CD , Hai đường chéo vuông góc biết AC =16cm BD= 12cm. Tính chiều cao hình thang

It’s going to be d. 4x^2-4x-19’

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 *_*