I need help with these problems?

Question

I know these are simple problems but i can't seem to get them right:

find the distance between the pts. (-1, 4) and (3,1)

use the function f(x)= x and g(x)= 2x-4 to find f(x) * g(x)

thanks for the help for those who helped me!!!

Answer 1

find the distance between the pts. (-1, 4) and (3,1)
d( (-1, 4) , (3,1) ) = sqrt( (-1-3)^2 +(4-1)^2 )
= sqrt( 16+ 9 ) = sqrt(25) =5

use the function f(x)= x and g(x)= 2x-4 to find
f(x) * g(x) = x(2x-4) = 2x^2 -4x .

Answer 2

distnace is the square root of (x-x)^2 + (y-y)^2

so... ul get square root of 16+9 which equals to 25

and then ul have to take its square root and get a 5.


ok. d next problem is just plugging in into its corresponding values!
so if f(x) multiplied by g(x)

u'll get 2x squared - 4x

ok?! hahahah =) goodluck