# What is #|| <-1, 9, -2 > - < 9 , -4, 1 > ||#?

##### 1 Answer

Mar 28, 2016

#### Explanation:

This effectively asking you to find the magnitude of the vector sum.

Solution Strategy:

1) Perform vector addition (subtraction)

2) Compute the magnitude of the new vector,

Let

Then 1)

and 2)