Choose all answers that are correct. 1.√50=5√2....2.√27=3√3....3. √20=4√5....4. √125=5√5
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A matrix is diagonal if
In other words, you want non-zero elements only when the indices of the row and the column are the same: the first element of the first row must be non zero, the second element of the second row must be non-zero, and so on. All other elements must be zero.
