bonjour
f(x) = 4 x² + 4 x + 1 - 4
f(x) = 4 x² + 4 x - 3
g(x) = x ( x² - 6 x + 9)
g(x) = x³ - 6 x² + 9 x
h(x) = -2 ( x² - 6 x + 9 ) + 1
h(x) = - 2 x² + 12 x - 18 + 1
h(x) = - 2 x² + 12 x - 17
e(x) = ( x² + 3 x - 5 x - 15 ) - ( x² - 2 x)
e(x) = x² - 2 x - 15 - x² + 2 x
e(x) = - 15