The Total solution for NCERT class 6-12
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(i) (3x + 7)2 – 84x =(3x – 7)2
(ii) (9p – 5q)2+ 180pq= (9p + 5q)2
(iii) (4/3m – 3/4n)2 +2mn = 16/9 m2 +9/16 n2
(iv) (4pq + 3q)2– (4pq– 3q)2 = 48pq2
(v) (a – b) (a + b) + (b – c) (b + c) + (c – a) (c + a) = 0