bonjour
f (x) = 36 x² - 60 x + 23
36 x² - 60 x + 23 = - 2
36 x² - 60 x + 23 + 2 = 0
36 x² - 60 x + 25 = 0
( 6 x - 5 ) ² = 0
x = 5/6
36 x² - 60 x + 23 = - 60 x + 32
36 x² - 60 x + 60 x = 32 - 23
36 x² = 9
x² = 9/36
x = √9/36 ou - √9/36
x = 3/6 ou ( - 3/6 )
