Question

If the distance between points (x , 0 ) and (0,3) is 5, what are values of x ?

Answer 1

Distance formula,
(Distance)² = (x2-x1)² + (y2-y1)²
(Distance)² = (0-x)² + (3-0)²
(5)² = (-x)² + (3)²
25 = x² + 9
x² = 16
x = ±4

Answer 2

distance between two point


(x-0)^2-(3-0)^2= 5^2
x^2=25-9

x=4