Bonjour, Resoudre -4x^2+1=0

bonjour,

-(2x-1)(2x+1) = 0

x =-1/2; 1/2

bonjour

-4x²+1 =0
1-4x² =0
(1-2x)(1+2x) =0

1-2x =0                                  1+2x =0
-2x = -1                                       2x = -1
x = -1/-2                                        x = -1/2
x =1/2

solution ( -1/2 ; 1/2)