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What is the middle term in ( (2m+3)^2 )?

Answer and explanation

Correct answer: (12m)

The expression has the form
\((a+b)^2=a^2+2ab+b^2\). The middle term is the product term in the centre, formed by twice the product of the two terms being added. Here, those terms are \(2m\) and \(3\). Therefore, the middle term is \(2(2m)(3)=12m\). Thus, option B is correct. Option C, \(4m^2\), is the first square, and option D, \(9\), is the last square; neither is the middle term.

To solve similar questions, first identify \(a\) and \(b\), then use \(2ab\). Substituting gives \(2\times2m\times3=12m\). The coefficient is multiplied by both the variable term and the constant, so stopping at \(6m\) misses the required factor of 2. The supplied answer and explanation are mathematically correct and clearly identify the middle term.

Related tags

Middle TermBinomial Square2M Plus 3

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