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Please answer my question Please tell me the crt answer |
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Answer» -step EXPLANATION:ANSWER:First we need to know the formula:-(a+b+c)²= a²+b²+c²+2(ab+bc+ca)Given:-a+b+c= 9a²+b²+c²= ?ab+bc+ca= 26Let to find be x.So placing the VALUES,(9)²= x + 2(26)81 = x + 52x = 81-52a²+b²+c²= 29So the REQUIRED answer is 29.Some Identities(a+b)²=a²+2ab+b²(a-b)²=a²-2ab+b²(a²-b²)= (a-b)(a+b)a²+b²= (a+b)²-2abORa²+b²= (a-b)²+2abThis is a GENERALISED form and not preferred generally(a+b+c)²= a²+b²+c²+2(ab+bc+ca) |
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