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Questions  >>  CBSE XII  >>  Math  >>  Vector Algebra
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Evaluate the product $(3\overrightarrow a − 5\overrightarrow b) ⋅ (2\overrightarrow a + 7\overrightarrow b)$

$\begin{array}{1 1} (A) 6|\overrightarrow a|^2+35|\overrightarrow b|^2+11\overrightarrow a.\overrightarrow b \\ (B) 6|\overrightarrow a|^2-35|\overrightarrow b|^2-31\overrightarrow a.\overrightarrow b \\ (C) 6|\overrightarrow a|^2-35|\overrightarrow b|^2+31\overrightarrow a.\overrightarrow b \\ (D) 6|\overrightarrow a|^2-35|\overrightarrow b|^2+11\overrightarrow a.\overrightarrow b \end{array} $

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