We observe that the above polynomial has two terms. Here the first term is 2x and the second term is -4
Now we will determine the exponent of each term.
(i) the exponent of the first term 2x = 1
(ii) the exponent of the second term -4 = 1
Since, the greatest exponent is 1, the degree of 2x – 4 is also 1.
Therefore, the degree of the polynomial 2x – 4 = 1.