सर चंद्र का संधि विच्छेद
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Explanation:
formula (a+b+c) 2 =a2 +b 2 +c 2 +2(ab+ bc+ ca)
(3a-7b-c)2 =(3a)2 +(-7b)2 +(-c) 2 +2{(3a)(-7b) +(-7b)(-c) +(-c)(3a)}
=9a2+49b2+c2 -42ab+14bc-6ca
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Answer:
च्+अं+द्+र
Explanation:
च्+अं+द्+र
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