Find a basis for the row space of aa, a basis for the column space of aa, a basis for the null space of aa, the rank of aa, and the nullity of aa. (note that the reduced row echelon form of aa is ⎡⎣⎢⎢⎢1000−40000100−4−4000−300⎤⎦⎥⎥⎥[ 1−40−40001−4−30000000000].)

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b