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Back to Multiply matrices by scalars — Problem 3 · Task Set 22

Exercises: Multiply Matrices by Scalars

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Grade 9·18 problems·~25 min·Common Core Math - HS Number and Quantity·standard·hsn-vm-c-7
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Fluency Practice

1.

For A=[52−13]A = \begin{bmatrix} 5 & 2 \\ -1 & 3 \end{bmatrix}, find the (1,1)(1,1) entry of (−1)A(-1)A (i.e., −A-A).