Te ajut la a si la b !
a) 2x^2 = 2 <=> x^2 = 1 <=> /x/ = 1 <=> x = - 1 ; x = + 1 ;
b) 4x^2 = 2 <=> x^2 = 1 / 2 <=> / x / = [tex] \frac{ \sqrt{2} }{2} [/tex] <=>
x = + [tex] \frac{ \sqrt{2} }{2} [/tex] ; x = - [tex] \frac{ \sqrt{2} }{2} [/tex] ;
Bafta !
