on square bcde if e is located at (4,-9) and d is located at (10,-5) find the perimeter of the square

Which of the following is the result of expanding the series

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236

Grant simplified the expression 1.5(-3.2 + 2.5) his work is shown below explain the error in grants work