Answer:
Step-by-step explanation:
It doesn’t say if x is a diameter or if the extended chord is a hypotenuse. I will assume so; it’s the only solution I can think of.
(x/2)^2 + (x/2 + 2)^2 = (7+5)^2
(x/2)^2 + 2x - 140 = 0
x = -2 ± 2√71
-2 - 2√71 Is an extraneous solution, so x = -2 + 2√71
