Answer:
x = 2√11
y = 4√47
Step-by-step explanation:
x^2 + 10^2 = 12^2
x^2 + 100 = 144
x^2 = 144 - 100
x^2 = 44
x^2 + 12^2 = y^2
44 + 144 = y^2
188 = y^2
y = 2√47
