Identify which of the following expressions are polynomials

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Identify which of the following expressions are polynomials. If so, write their degrees.
(i) \frac{2}{5}x4 – \sqrt{3}x2 + 5x – 1
(ii) 7x3 – \frac{3}{x^{2}} + \sqrt{5}
(iii) 4a3b2 – 3ab4 + 5ab + \frac{2}{3}
(iv) 2x2y – \frac{3}{x y} + 5y3 + \sqrt{3}

Solution:
ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 10 Algebraic Expressions and Identities Ex 10.1 4

Add the following expressions:
(i) ab – bv, bv – ca, ca – ab
(ii) 5p2q2 + 4pq + 7,3 + 9pq – 2p2q
(iii) l2 + m2 + n2, lm + mn, mn + nl, nl + lm
(iv) 4x3 – 7x2 + 9, 3x2 – 5x + 4, 7x3 – 11x + 1, 6x2 – 13x

Solution:
ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 10 Algebraic Expressions and Identities Ex 10.1 5

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