Question

Sendo A= (x+1/2) e B=(x-1/x) calcule (A+B)² (A-B)²

Answer 1

[(X+1/2) +( X-1/2)]² . [(X+1/2) - (X - 1/2)]² = [X +1/2 +X - 1/2].[x +1/2-X +1/2] =

(2X)². (1/2+1/2) =     4X².1 = 4X²