In Exercises 9 - 16, find the following matrices:

c. - 4A

3 1 ...

Question

In Exercises 9 - 16, find the following matrices: c. - 4A 3 1 1 2 - 3 6 A = B = - 1 2 5 - 3 1 - 4

Matrices A and B for college algebra, chapter 7, introduction to matrices.

Accepted Answer

Hey everyone here we are asked to perform the matrix operation negative two times A. Now before we begin solving we want to first just substitute in this matrix given for our variable A. So we have negative two times matrix A. Which is given as a two by three. Matrix with the values too 54 and negative 310. So now all we have to do is take the scalar value negative two and multiply it by each entry of the matrix. So we first have negative two times the first value which is two. Then we have negative two times five. Then we have negative two times four. And moving on to the second row we have negative two times negative three. Then negative fun. And lastly negative two times zero. So now all that is left to do is simplify. So we have negative two A. Is equal to the two by three. Matrix with the values negative two times two gives us negative four. Then negative two times five is negative 10 negative two times four is negative eight. And now for our second role we have negative two times negative three which is positive six then negative two times one gives us negative two and finally negative two times zero is just zero. So we are left with answer choice D. Thanks for watching. I hope you found this video helpful and I'll see you again next time

In Exercises 9 - 16, find the following matrices: c. - 4A 3 1 1 2 - 3 6 A = B = - 1 2 5 - 3 1 - 4

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