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ALGEBRA ALGEBRA o b2 + = . + (a+b-c)(a - b+c). (b+a-c)(b-a+c) (a +c+b)(a + c-b)' (a+b+c)(a +b-c) (c+a - b)(c-a+b) (b+c+a)(b + c-a) a c2 (a - b)(c-a) (b - c)(a - b) (c-a)(b-c) (Writing in cyclic order) - -a(b-c) – bº(c-a)-c? (a - b) (a - b)(b-c)(c-a) + - 11 a+b-C b-ac C+a-b + + a +b+c a+b+c a + b + c -a-b+a'c-bac + bºa-c+a+cb (a - b)(b -c)(c-a) a + b-C+b-a+C+ C+ a-b a + b + c a + b + c a+b+c 1: C- a+b+b+a+a-c-b²c-c+a+c²b (a-b) (c)(c-a) 1 21. If x + Y ū + ܕܐ 1 1 = 1 and y + =1 then 2+ = = ? 2 х (2) x TO S(4) 1 (1)-1 (3) x2 -ab(a - b)+cla? – b2) -c-(a - b) (a-b)(b -c)(c-a) 19-0 -abla-b)+c(a - b)(a + b)-c(a - b) (a - b)(b -c)(c-a) 1-y-1 Sol. (4) X +=1 Y ..x=1-- = Y y 1 y - х y (a-b)l-ab+cla + b)-c?] (a - b)(b -c)(c-a) 1 and, y + == 1 1 . Z -1y =1-y z = (a - b)(-ab + ca + cb-c?] (a - b)(b-c)(b-a) --- 1-4 Z -y a - (a - b)(-a (b - c)+ c(b-c)] (a - b)(b - c)(c-a) 2 II y 7 4 คน คือ ต 4 ...
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