Odpowiedź :
x=4¹/₃=¹³/₃
y=¹/₅
x²-2xy+y²/x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁
y=¹/₅
x²-2xy+y²/x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁
x=4¹/₃=¹³/₃
y=¹/₅
x²-2xy+y²/x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁
y=¹/₅
x²-2xy+y²/x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁
x = 4¹/₃ = ¹³/₃
y = ¹/₅
x² - 2xy + y² / x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁
y = ¹/₅
x² - 2xy + y² / x+y
¹³/₃²-2*¹³/₃*¹/₅+¹/₅²:¹³/₃+¹/₅ =
= ¹⁶⁹/₉-²⁶/₃*¹/₅+¹/₂₅:⁶⁵/₁₅+³/₁₅ =
= ¹⁶⁹/₉-²⁶/₁₅+¹/₂₅:⁶⁸/₁₅ =
= ¹⁶⁹⁰/₉₀-¹⁵⁶/₉₀+¹/₂₅:⁶⁸/₁₅ =
= ¹⁵³⁴/⁹⁰+¹/₂₅:⁶⁸/₁₅ =
= ⁷⁶⁷⁰/₄₅₀+¹⁸/₄₅₀:⁶⁸/₁₅ =
= ⁷⁶⁸⁸/₄₅₀:⁶⁸/₁₅
= ⁷⁶⁸⁸/₄₅₀*¹⁵/₆₈
= 3 ¹⁹⁶/₉₆₁