Question

find the square of a+2b+c​

Answer 1

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(a+2b+c)²

=>a²+(2b)²+c²+2(a)(2b)+2(2b)(c)+2(c)(a)

=>a²+4b²+c²+4ab+4bc+2ac

{•°•(a+b+c)²=a²+b²+c²+2ab+2bc+2ca}

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