Question

dada as matrizes a= 5 10 15 20 e b= 0 -5 -10 20 , obtenha a matriz x de modo que 5x-a=b

Answer 1

A= (20×5) - (15×10)
A= (100) - (150)
A= 100 - 150
A= -50

B= (0×20) - ( -10 x -15)
B= (0)- (150)
B= 0 - 150
B= -150


5x - (-50)= -150
5x + 50= -150
5x = -150 - 50
5x = -200
x = -200÷5
x= -40