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Question
विस्तार करो।
(5a + 6b)2
Sum
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Solution
हम जानते हैं सूत्र:
(a + b)2 = a2 + 2ab + b2
(5a + 6b)2
a = 5a, b = 6b
= (5a)2 + 2 × (5a) (6b) + (6b)2
= 25a2 + 60ab + 36b2
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