tolong bantu saya mengerjakannya!

x²+y²-2xy
= (2+√3)²+(3-√2)²-2(2+√3)(3-√2)
= 4+3 + 9-2 -2 (6+2√2+3√3- √6)
= 7 + 7 -12-4√2-6√3-√6
= 2-4√2-6√3-√6

x² + y² - 2xy
= (2 + √3)² + (3 - √2)² - 2 (2 + √3) (3 - √2)
= (4 + 4√3 + 3) + (9 - 6√2 + 2) - 2(6 - 2√2 + 3√3 - √6)
= 7 + 4√3 + 11 - 6√2 - 12 + 4√2 - 6√3 + 2√6
= 6 - 2√2 - 2√3 + 2√6

= 2 (3 - √2 - √3 + √6)