Answer:
12,-36
Step-by-step explanation:
us the distance formula,
distance = [tex]\sqrt{(9-2)^2 + (-12-a)^2[/tex]
squaring on both sides,
[tex]25^2 = 7^2 + (-(12+a))^2\\625 = 49 + (12+a)^2\\(12+a)^2 = 576\\12+a = 24 or 12+a = -24\\a = 12 , a =-36[/tex]
