Question

Find the product or type
"impossible".
1 -2
-3 4
3 4 2 -7

Answer 1

Our answer should be this :

[-7 18]

[-1. -16]

Answer 2

see attached

Explanation:

Your calculator, spreadsheet, or any number of apps or web sites can compute a matrix product for you. The requirement for the product to exist is that the number of columns in the left matrix match the number of rows in the right matrix.

The product term at location (row, column) = (j, k) in the product is the dot-product of row j in the left matrix with column k in the right matrix. For example, in this matrix product, term (1,2) in the product is the dot-product ...

[1, -2]·[4, -7] = (1)(4) +(-2)(-7) = 4 +14 = 18 . . . product term (1, 2)

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The attachment shows the full product.