(i) 2x3 + 5x2 – 7
We know that in a polynomial, degree is the highest power of the variable.
The degree of the polynomial, 2x3 + 5x2 – 7 is 3.
(ii) 5x2 – 3x + 2
The degree of the polynomial, 5x2 – 3x + 2 is 2.
(iii) 2x + x2 – 8
The degree of the polynomial, 2x + x2 – 8 is 2.
(iv) 1/2y7 – 12y6 + 48y5 – 10
The degree of the polynomial, 1/2y7 – 12y6 + 48y5 – 10 is 7.
(v) 3x3 + 1
The degree of the polynomial, 3x3 + 1 is 3
(vi) 5
The degree of the polynomial, 5 is 0 (since 5 is a constant number).
(vii) 20x3 + 12x2y2 – 10y2 + 20
The degree of the polynomial, 20x3 + 12x2y2 – 10y2 + 20 is 4.