Write the degree of each of the following polynomials.
(i) 2x2 + 5x2 − 7
(ii) 5x2 − 3x + 2
(iii) 2x + x2 − 8
(iv) $\frac{1}{2} y^{7}-12 y^{6}+48 y^{5}-10$
(v) 3x3 + 1
(vi) 5
(vii) 20x3 + 12x2y2 − 10y2 + 20
(i) Correction : It is $2 \mathrm{x}^{3}+5 \mathrm{x}^{2}-7$ instead of $2 \mathrm{x}^{2}+5 \mathrm{x}^{2}-7$.
The degree of the polymonial $2 \mathrm{x}^{3}+5 \mathrm{x}^{2}-7$ is 3 .
(ii) The degree of the polymonial $5 x^{2}-35 x+2$ is 2 .
(iii) The degree of the polymonial $2 \mathrm{x}+\mathrm{x}^{2}-8$ is 2 .
(iv) The degree of the polymonial $\frac{1}{2} \mathrm{y}^{7}-12 \mathrm{y}^{6}+48 \mathrm{y}^{5}-10$ is 7 .
(v) The degree of the polymonial $3 \mathrm{x}^{3}+1$ is 3 .
(vi) 5 is a constant polynomial and its degree is 0 .
(vii) The degree of the polymonial $20 \mathrm{x}^{3}+12 \mathrm{x}^{2} \mathrm{y}^{2}-10 \mathrm{y}^{2}+20$ is 4 .