bonjour
1)
[(( -5.7 + 1 )*-4)-(-5.7)]/2
= [(-4.7)*-4)-(-5.7)] /2
= 24.5/2
= 12.25
2)
100+1 = 101
101*-4 = -404
-404-100 = -504
-504/2 = -252
3)
[ ((x+1)*-4)-(x)] /2 = 0
[ -4x-4 - x ] /2 = 0
-5x - 4 = 0
-5x = 4
x= 4/-5
bonne continuation
Bonjour,
1)
-5,7
-5,7 +1 = -4,7
-4,7 *-4 = 18,8
18,8 -(-5,7) = 18,8 + 5,7 => 24,5
24,5/2 = 12,25
2)
100
100 +1 =101
101* (-4) = -404
-404 -100 = -504
-504/2 = -252
3)
x
x+1
(x+1) -4 = -4x -4
-4x -4 -x = -5x-4
(-5x-4)/2 = 0
-5x-4 = 0*2 = 0
-5x =4
x= - 4/5
Vérif
-4/5 +1 = -4/5 +5/5 = 1/5
1/5 * -4 = -4/5
-4/5 -(-4/5) = -4/5 +4/5 = 0