927.sagews

Ejercicio 1.4

*Efectuar

1)

var ('x,y')

(x, y)

(2*x^2 - 3*y^2)^2

(2*x^2 - 3*y^2)^2

2)

var ('a')

a

(a^2+3) * (a^2-3)

(a^2 - 3)*(a^2 + 3)

3)

var ('x')

x

(x^2+x+1) * (x^2+x-1)

(x^2 + x - 1)*(x^2 + x + 1)

4)

var ('a,b,c')

(a, b, c)

(a - b + c) * (a + b + c)

(a - b + c)*(a + b + c)