Exercises: Understand Zero and Identity Matrices

Work through each section in order. Show your work where indicated.

Grade 9·19 problems·~30 min·Common Core Math - HS Number and Quantity·standard·hsn-vm-c-10

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Recall / Warm-Up

For the $2 \times 2$ matrix $A = \begin{bmatrix}a & b \\ c & d\end{bmatrix}$ , which formula gives $\det(A)$ ?

$ad + bc$

$ac - bd$

$ad - bc$

$a + b + c + d$