Question

Efectuar:
S=(x+y-√3)(x+y+√3)-(x-y+√3)(x-y-√3)

Answer 1

(x+y-√3)(x+y+√3)-(x-y+√3)(x-y-√3)

Sea

x+y = a

x-y = b

(x+y-√3)(x+y+√3)-(x-y+√3)(x-y-√3)

(a - √3)(a + √3)-(b + √3)(b - √3)

a² - 3 - (b² - 3)

a² - 3 -  b² + 3

a² - b²

(x + y)² - (x - y)²

x² + 2xy + y² - ( x² - 2xy + y² )

x² + 2xy + y² -  x²  + 2xy -  y²

x² - x² + 2xy + 2xy + y² - y²

4xy

MI CORONITA

Eternamente axllxa