PDF chapter test TRY NOW

Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.
 
(i) \(1x^2-6x+4\) is
 
(ii) \(s^2+\sqrt{5}\) is
 
(iii) \(6\sqrt{t}+t\sqrt{5}\) is
 
(iv) \(s+\frac{6}{s}\) is
 
(v) \(x^{10}+y^{3}+p^{50}\) is
Answer variants:
univariate polynomial
not an univariate polynomial