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
