Question

Which shows the difference of these matrices? If the matrix does not exist, select impossible.

[
6 3 10 4
1 −7 −8 3
] − [
10 −5 3 1
9 −4 0 −2
]


Multiple choice question.

A)
[
−4 8 7 3
−8 −3 −8 5
]


B)
[
−8 −3 −8 5
−4 8 7 3
]


C)
[
4 −8 −7 −3
8 3 8 −5
]


D)
impossible

Answer 1

A

Compute entrywise: row1 = (6−10, 3−(−5), 10−3, 4−1) = (−4, 8, 7, 3); row2 = (1−9, −7−(−4), −8−0, 3−(−2)) = (−8, −3, −8, 5).