Chứng minh rằng một tự đồng cấu f : V → V là đẳng cự khi và chỉ khi nó bảo toàn tích vô hướng, tức là

hf(x)|f(y)i = hx|yi, ∀x, y ∈ V.

The answer is

Bis your answer. it only holds the decimal numerals

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 *_*