Bonjour,
→2x+7-x².
remplacer x par : -2,
=> 2*-2 +7 -4 = -1
-1,
=> 2*-1 +7 -2 = 7
0 =>7
0.5, =>
2*0,5 +7 -0,25 = 7,75
1: => 2+7 -1 = 8
1.5 =>
2*1,5 +7 - 2,25= 7,75
2=> 7
3 => 4
4 => -1
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Bonjour,
→2x+7-x².
remplacer x par : -2,
=> 2*-2 +7 -4 = -1
-1,
=> 2*-1 +7 -2 = 7
0 =>7
0.5, =>
2*0,5 +7 -0,25 = 7,75
1: => 2+7 -1 = 8
1.5 =>
2*1,5 +7 - 2,25= 7,75
2=> 7
3 => 4
4 => -1