If possible, find AB, BA, and A2.

First product:

Notice how multiplying A by B produces A again, because B is an identity matrix.

The second product cannot be carried out because A has more columns that B has rows.

The third product also cannot be computed because A is not a square matrix.

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

thats not a system of equations, that is a solution