Given that P = (5, 9) and Q = (13, 12), find the component form and magnitude of PQ? I found but I can't figure out if the second one is sqrt73 or just 73

Question

Given that P = (5, 9) and Q = (13, 12), find the component form and magnitude of PQ? 

I found <8,3> but I can't figure out if the second one is sqrt73 or just 73

amistre64 · Answer

square the value:

(8^2 , 3^3)

add them together

64+9 = 72

and take the square root of it:

sqrt(72)

and simplify

amistre64 · Answer

72 = 9*8 = 9*4*2

sqrt(9.4.2) = sqrt(9) sqrt(4) sqrt(2) = 3*2 sqrt(2)

amistre64 · Answer

forgot how to add lol

amistre64 · Answer

64+9 = 73 ....  so sqrt(730

amistre64 · Answer

sqrt(73)  my keyboard hates me

anonymous · Answer

OH! okay so it's just x62+y^2 basically and then take the square root of what you get? LOL that's okay mine does too

anonymous · Answer

x^2**

amistre64 · Answer

:)  yes

anonymous · Answer

muchas gracias :D you're a life saver, I suck at vectors.. -__-

amistre64 · Answer

vectors are just right triangles at heart ;)  good luck

anonymous · Answer

They're a pain! xD and thanks I need it...lol!