Dot product is
a*b = |a|*|b|*cosα.
In our case
u*u =|u|*|u|*cos 0
u*u =|u|*|u|
12=|u|²
|u|=√12=√(4*3)=2√3
Answer: <span>D. 2√3</span>
Answer:
A, B, and D
Step-by-step explanation:
Answer:
x = 4 x = -14
Step-by-step explanation:
|x + 5| = 9
The absolute value equation has a positive and negative solution
x+5 = 9 x+5 = -9
Subtract 5 from each side
x+5-5 = 9-5 x+5-5 = -9-5
x = 4 x = -14
(y2-y1 , x2-x1)
y1=3
y2=0
x1=-1
x2=5
