Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.
(i) \(7x^2-7x+4\) is
(ii) \(b^2+\sqrt{5}\) is
(iii) \(7\sqrt{t}+t\sqrt{5}\) is
(iv) \(b+\frac{7}{b}\) is
(v) \(b^{10}+g^{3}+q^{50}\) is
Answer variants:
not an univariate polynomial
univariate polynomial