Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer.
(i) \(10x^2-6+6\) is
(ii) \(y^2+\sqrt{7}\) is
(iii) \(6\sqrt{t}+t\sqrt{7}\) is
(iv) \(y+\frac{7}{y}\) is
(v) \(x^{6}+y^{7}+t^{10}\) is
Answer variants:
a polynomial in one variable
not a polynomial in one varible