Question

Find y if the distance between

points P and R is 25 and point R
is located in the first quadrant.
p= (3,-18) r=(10,y)

Answer 1

y = 6

Explanation:

`√((10-3)^2 + (y+18)^2) = 25 \\ 49 + y^2 + 324 + 36y = 625 \\`

y^2 + 36y - 252 = 0

(y-6)(y+42) = 0

y = 6 (accettable)

y = -42 (not accettable)