4x² -4x +1 =0 a= b= c= delta=b² -4ac= merci de maider

4x² - 4x + 1 = 0

ax² + bx + c = 0

=> a = 4

b = - 4

c = 1

donc delta = b² - 4ac = (-4)² - 4 * 4 * 1 = 16 - 16 = 0

=> racine double

logique car 4x² - 4x + 1  se factorise par (2x - 1)²

donc racine double = 1/2

bonjour

4 x² - 4 x + 1 = 0

Δ = ( - 4 )² - 4 ( 4 * 1 ) = 16 - 16 = 0

Δ   = 0

donc  1 seule solution

x 0 =   4 / 8  = 1 /2