Use the matrices AA and BB below instead of those in your text. A=begin{bmatrix}-6 & -1 -3 & -4 end{bmatrix} B=begin{bmatrix} -1 & 3 -5 & -8 end{bmatrix} 1) 2A+B=? 2)A-4B=?

nagasenaz 2021-02-25 Answered
Use the matrices AA and BB below instead of those in your text.
A=[6134]B=[1358] 1) 2A+B=? 2)A-4B=?
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Expert Answer

likvau
Answered 2021-02-26 Author has 75 answers
Step 1
To determine the values of the given matrix expressions (as matrices)
Step 2
Matrix addition (substraction) , scalar multiplication are performed entriwise
Step 3
Matrix addition, (subtraction) and scalar multiplication rules
If A=[abcd],B=[pqrs] then
A±B=[a±pb±qc±rd±s] and
kA=[kakbkckd] (k any scalar)
Step 4
1) computing 2A+B
2A+B=[12268]+[1358]
=[1212+36588]
=[1311116]
step 5
2) Computing A-4B
A4B=[6134]+[4122032]
=[2131728]
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Jeffrey Jordon
Answered 2022-01-22 Author has 2047 answers

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