2<\/sup> is 1<\/p>\n(iv) 3 – pq + qr – rp \nTerms are 3, -pq, qr and -rp \nCoefficient of 3 is 3. \nCoefficient of -pq is -1. \nCoefficient of qr is 1 and coefficient of -rp is -1<\/p>\n
(v) \\(\\frac{x}{2}+\\frac{y}{2}\\) – xy \nTerms are \\(\\frac{x}{2}, \\frac{y}{2}\\) and -xy \nCoefficient of \\(\\frac{\\mathrm{x}}{2}\\) is \\(\\frac{1}{2}\\) \nCoefficient of \\(\\frac{\\mathrm{x}}{2}\\) is \\(\\frac{1}{2}\\) \nand coefficient of -xy is -1<\/p>\n
(vi) 0.3a – 0.6ab + 0.5b \nTerms are 0.3a, -0.6ab and 0.5b \nCoefficient of 0.3a is 0.3 \nCoefficient of -0.6ab is -0.6 \nCoefficient of 0.5b is 0.5<\/p>\n
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Question 2. \nClassify the following polynomial as monomials, binomials, trinomials. Which polynomials do not fit in any of these three categories? \nx + y, 1000, x + x2<\/sup> + x3<\/sup> + x4<\/sup>, 7 + y + 5x, 2y – 3y2<\/sup>, 2y – 3y2<\/sup> + 4y3<\/sup>, 5x – 4y + 3xy, 4z – 15z2<\/sup>, ab + bc + cd + da, pqr, p2<\/sup>q + pq2<\/sup>, 2p + 2q \nSolution: \nMonomials: 100pqr \nBinomials: x + y; 2y – 3y2<\/sup>; 4z – 15z2<\/sup>; p2<\/sup>q + pq2<\/sup>; 2p + 2q \nTrinomials: 7 + y + 5x; 2y – 3y2<\/sup> + 4y3<\/sup>; 5x – 4y + 3xy \nPolynomials that do not fit in these categories: x + x2<\/sup> + x3<\/sup> + x4<\/sup> and ab + bc + cd + da \n(Since the above polynomials has four terms)<\/p>\nQuestion 3. \nAdd the following. \n(i) ab – bc, bc – ca, ca – ab \n(ii) a – b + ab, b – c + bc, c – a + ac \n(iii) 2p2<\/sup>q2<\/sup> – 3pq + 4, 5 + 7pq – 3p2<\/sup>q2<\/sup> \n(iv) l2<\/sup> + m2<\/sup>, m2<\/sup> + n2<\/sup>, n2<\/sup> + l2<\/sup>, 2lm + 2mn + 2nl \nSolution: \n(i) ab – bc; bc – ca; ca – ab \n <\/p>\n(ii) a – b + ab; b – c + bc; c – a + ac \n <\/p>\n
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(iii) 2p2<\/sup>q2<\/sup> – 3pq + 4; 5 + 7pq – 3p2<\/sup>q2<\/sup> \n <\/p>\n(iv) l2<\/sup> + m2<\/sup>; m2<\/sup> + n2<\/sup>; n2<\/sup> + l2<\/sup>; 2lm + 2mn + 2nl \n \n= 2(l2<\/sup> + m2<\/sup> + n2<\/sup> + lm + mn + nl)<\/p>\nQuestion 4. \n(a) Subtract 4a – 7ab + 3b + 12 from 12a – 9ab + 5b – 3 \n(b) Subtract 3xy + 5yz – 7zx from 5xy – 2yz – 2zx + 10xyz \n(c) Subtract 4p2<\/sup>q – 3pq + 5pq2<\/sup> – 8p + 7q – 10 from 18 – 3p – 11q + 5pq – 2pq2<\/sup> + 5p2<\/sup>q \nSolution: \n <\/p>\n","protected":false},"excerpt":{"rendered":"These NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1 Questions and Answers are prepared by our highly skilled subject experts. NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Exercise 9.1 Question 1. Identify the terms, their coefficients for each of the following expressions. (i) 5xyz2 …<\/p>\n
NCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1<\/span> Read More »<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","spay_email":""},"categories":[7],"tags":[],"yoast_head":"\nNCERT Solutions for Class 8 Maths Chapter 9 Algebraic Expressions and Identities Ex 9.1 - MCQ Questions<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n