Question

resolva
(y:2 + 1:3)^2 - (y:2 - 1:3)^2 =10

Answer 1

(y²/4+y/3+1/9) - (y²/4-y/3+1/9) =10
y²/4+y/3+1/9-y²/4+y/3-1/9=10
y/3+y/3=10
2y/3=10
2y=30
y=30/2
y=15