Explications étape par étape :
f(x) = -5x - 4
f(5) = -5 * 5 - 4
⇔ f(5) = -25 - 4
⇔f(5) = -29
g(x) = 2x² - 4x - 4
g(-2) = 2(-2)² - 4 * -2 - 4
⇔ g(-2) = 8 + 8 - 4
⇔ g(2) = 12
h(x) = ( 3x + 2 )²
h(-2) = [ 3 *(- 2) + 2 ]²
⇔ h(-2) = (-4)²
⇔ h(-2) = 16
i(x) = ( -3x + 3 ) ( -2x + 4 )
i(-1) = [ -3 *(-1) + 3 ] [ -2 (-1) + 4 ]
⇔ i(-1) = 6 * 6
⇔i(-1) = 36
j(x) = ( 6x + 6 ) / ( -3x + 12 )
j(2) = ( 6 * 2 + 6 ) / ( -3 * 2 + 12 )
⇔ j(2) = 18 / (6)
⇔ j(2) = 3
k(x) = 12x - 3
k(7/3) = 12 * 7/3 - 3
⇔ k(7/3) = 4 * 7 - 3
⇔ k(7/3) = 25
l(x) = 2x² + 7x + 2
l(1) = 2 * 1² + 7 * 1 + 2
⇔ l(1) = 11 ( 1 ; 11 )
m(x) = -6x + 6
-6x + 6 = -24
⇔ -6x = -30
⇔ x = 5
Le vol aura eu lieu dans le labo de maths
