Compute the following:\left[ \begin{array}{cc}{a} & {b} \\ {-b} & {a}\ – InterviewSolution

1.	Compute the following:\left[ \begin{array}{cc}{a} & {b} \\ {-b} & {a}\end{array}\right]+\left[ \begin{array}{ll}{a} & {b} \\ {b} & {a}\end{array}\right]
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