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Question

Write the degree of each of the following polynomials:

(i) 5

(ii) -32

(iii) 4p - 5

(iv) 3y + 4y2

(v) x9 - x4 +_ x12 + x - 2

(vi) 5m2n - 3

(vii) 2xy + 4x3

(viii) 7p2q3t - 11p4t + 2p8

(ix) 5x2yz3 + xy4z2

(x) ab2cd - 3a2bcd3 + 2ac4

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Solution

i 5 is a nonzero constant term. The degree of a nonzero constant term is 0 zero. Degree of 5=0

ii -32 is a nonzero constant term. The degree of a nonzero constant term is 0 zero. Degree of -32=0

iii 4p - 5 is a polynomial in variable p. The highest power of p in the given expression is 1. Degree of 4p-5=1

iv 3y + 4y2 is a polynomial in variable y. The highest power of y in the given expression is 2. Degree of 3y+4y2=2

v x9-x4+x12+x-2 is a polynomial in variable x. The highest power of x in the given expression is 12. Degree of x9-x4+x12+x-2=12

vi 5m2n is a polynomial in variables m and n. Sum of the powers of m and n in the given expression=2+1=3 Degree of 5m2n=3

vii 2xy+4x3 is a polynomial in variables x and y. The maximum sum of the powers of x and y in the given expression is 3. Degree of 2xy+4x3=3

viii 7p2q3t-11p4t+2p8 is a polynomial in variable p, q and t. The maximum sum of the powers of p, q and t in the given expression is 8. Degree of 7p2q3t-11p4t+2p8=8

ix 5x2yz3+xy4z2 is a polynomial in variable x, y and z. The maximum sum of the powers of x, y and z in the given expression is 7. Degree of 5x2yz3+xy4z2=7

x ab2cd-3a2bcd3+2ac4 is a polynomial in variables a, b, c and d. The maximum sum of the powers of a, b, c and d in the given expression is 7. Degree of ab2cd-3a2bcd3+2ac4=7

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