Given
A
=
[
−
12
−
4
20
−
9
−
3
15
]
\displaystyle {A}={\left[\begin{array}{ccc} -{12}&-{4}&{20}\\-{9}&-{3}&{15}\end{array}\right]}
A
=
[
−
12
−
9
−
4
−
3
20
15
]
.
a. Find the basis for the row space and column space of A.
b. Find the nullity of A.
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