Change math of cicada

The sum of all component of matrix AB +2B for two matrix ?

1) 10          2) Not 10

AB+2B=(A+2E)B=(3E+2E)B=(5E)B=5B

A change in the locust larvae Incoming called 3E. So E is after a short life, like (5E)B = 5B into a B disappear.

Answer is No.1