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Show that (a-b)(a+b)+(b-c)(b+c)+(c-a)(c+a)=0

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asked Jan 10, 2018 in Mathematics by Golu (37,045 points) ● 19 ● 145 ● 414

Show that:

(i) (3x+7)2-84x=(3x-7)2
(ii) (9p-5q)2 + 180 pq = (9p + 5q)2

(iii) (4pq+3q)2 – (4pq-3q)2=48pq2
(iv) (a-b)(a+b)+(b-c)(b+c)+(c-a)(c+a)=0

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answered Jan 10, 2018 by Annu Priya (18,055 points) ● 24 ● 45 ● 82

Solution:

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Simplify: (i) (x^2-5) (x+5) +25 (ii) (a^2+5)(b^2+3)+5
asked Jan 10, 2018 in Mathematics by Golu (37,045 points)

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