Question

Ayúdenme por favor,es urgente!​

Answer 1

Respuesta:

Explicación:

1-n⁴/1+n² = ( 1 - n² ) (1 + n²)/1+n² = (1 - n²)

9 - x⁴ / (3 -x²) = (3 - x²) (3 + x²) / (3 - x²) = (3 + x²)

x³ - 1 / x - 1 = (x² + x + 1) ((x-1)  / (x - 1) = (x² + x + 1)

25 - 36x⁴ /  5 - 6x² = (5 - 6x²)(5 + 6x²) / (5 - 6x²) =  (5 + 6x²)

x² - y²   /  x + y = (x - y) (x + y) / (x+y) = (x - y)

y² - x²   /  y + x = (y - x) (y + x) / y+x) = (y - x)