SOLUTION: How do I complete the multiplication: 2EA E= [1,2] A=[3,0,2,-1]

Algebra ->  Matrices-and-determiminant -> SOLUTION: How do I complete the multiplication: 2EA E= [1,2] A=[3,0,2,-1]      Log On


   

Question 175434: How do I complete the multiplication: 2EA
E= [1,2] A=[3,0,2,-1]
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
I am assuming that A is a 2x2 since you cannot multiply a 1x2 and a 1x4 matrix
:
%28matrix%281%2C2%2C1%2C2%29%29%28matrix%282%2C2%2C3%2C0%2C2%2C-1%29%29=%28matrix%281%2C2%2C-1%2C2%29%29
:
now multiply by 2 %28matrix%281%2C2%2C-1%2C2%29%29=%28matrix%281%2C2%2C-2%2C4%29%29