Please show me the workings of this no.2?
2 Answers
This is direct scalar multiplication and then subtraction of matrices.
Explanation:
Scalar multiplication of matrices simply means that each element in the matrix is multiplied by the constant. So, each element in A will be multiplied by 2.
Then, matrix subtraction (and addition) is performed by element by element subtraction.
So, in this case, 2(-8) = -16. Then, you will subtract the 1 in the upper right corner of B to give -16 - 1 = -17.
So, a = 17
Explanation:
Given that
Then
Given that
So for the element