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) \(4x^2-3+7\) is
 
(ii) \(y^2+\sqrt{2}\) is
 
(iii) \(3\sqrt{t}+t\sqrt{2}\) is
 
(iv) \(y+\frac{2}{y}\) is
 
(v) \(x^{10}+y^{3}+t^{50}\) is
Answer variants:
not a polynomial in one varible
a polynomial in one variable