1. [ ] [ ] [ ] [ ] EXAMPLE 3 Scalar multiplication Simplify the product:4
[ ]
2 – 1 – 3
SOLUTION 4
[ ]
2 – 1 – 3 =
[ ]
4(3) 4(0) 4(1)
4(2) 4(– 1) 4(– 3)
Multiply each element in the matrix by 4.
[ ] =
8 – 4 –12
Simplify.

2. [ ] [ ] [ ] [ ] GUIDED PRACTICE for Example 3 Simplify the product.3.
[ ] 5
–10
3 –
SOLUTION =
[ ]
5(2) 5(1) 5(–10)
5(3) 5(– 4) 5(7)
[ ] 5
–10
3 –
Multiply each element in the matrix by 5.
[ ] =
–50
15 –
Simplify.

3. [ ] [ ] [ ] [ ] GUIDED PRACTICE for Example 3 Simplify the product.4.
[ ] –2 –
9 – 5 –7
SOLUTION =
[ ]
–2(–4) –2(1) –2(0)
–2(9) –2(– 5) –2(–7 )
[ ] –2 –
9 – 5 –7
Multiply each element in the matrix by –2.
[ ] =
8 – –
Simplify.