Step-by-step explanation:
a=-4
a=-2
(a-(-4)(a-2)
(a+4)(a-2)
aa-2a+4a-8
a2-2a-8
Your final Andrew will be letter c
-2(4x-1)=5+7
(4x-1)=12/-2
4x=-6+1
x=-5/4
Answer:

Step-by-step explanation:
The magnitude of 3D vector
can be given by the following:

Plugging in given values, we have:
.