Answer
import turtle
turtle.penup()
turtle.goto(-39,48)
turtle.pendown()
turtle.write("(-39,48)")
turtle.color("red")
turtle.goto(50,-50)
turtle.color("black")
turtle.write("(50,-50)")
turtle.done()
Work Step by Step
Change the color to red after the first coordinate and then change it back to black before the second coordinate. This will make the lines red and the coordinates black.