Classify the following polynomials as polynomials in one-variable, two variable etc:

(i) x2-xy+7y2 (ii) x2-2tx+7y2-x+t


(iii) t3-3t2+4t-5 (iv) xy + yz + zx

(i) x2-xy+7y2 is a polynomial in two variable x, y.

(ii) x2-2tx+7y2-x+t is a polynomial in two variable x, t.


(iii) t3-3t2+4t-5 is a polynomial in one variable t.


(iv) xy + yz + zx is a polynomial in three variable x, y, t.


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