Bonsoir ! ;)
Réponse :
Exercice 53 :
a. (3x + 1) (6 - x)
Si x = 4 :
(3 * 4 + 1) (6 - 4) = 26
b. (3x + 1) (6 - x)
Si x = - 2 :
[3 * (- 2) + 1] [6 - (- 2)] = - 40
c. (3x + 1) (6 - x)
Si x = :
(3 * + 1) (6 - ) =
Exercice 54 :
a. - x² + 2y
Si x = 3 et y = 7 :
- 3² + 2 * 7 = 5
b. - x² + 2y
Si x = - 3 et y = - 8 :
- (- 3)² + 2 * (- 8) = - 25
Bonjour,
Calculer pur
x= 4 => (3(4)+1)(6-(4))= (12+1)(2)= 13(2)= 26
x= -2 => (3(-2)+1)(6-(-2))= (-6+1)(6+2)= -5(8)= -40
x= 5/6=> (3(5/6)+1)(6-5/6)=(5/2+1)(6-5/6)= (5/2+1*2/2)(6*6/65/6)=7/2(31/6)=217/12
calculer pour
x= 3 et y= 7
-(3)²+2(7)= -9+14= 5
x= -3 et y= -8
-(3)²+2(7)= -9+14=5
-(-3)²+2(-8)= -9-16= -25
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Bonsoir ! ;)
Réponse :
Exercice 53 :
a. (3x + 1) (6 - x)
Si x = 4 :
(3 * 4 + 1) (6 - 4) = 26
b. (3x + 1) (6 - x)
Si x = - 2 :
[3 * (- 2) + 1] [6 - (- 2)] = - 40
c. (3x + 1) (6 - x)
Si x = :
(3 * + 1) (6 - ) =
Exercice 54 :
a. - x² + 2y
Si x = 3 et y = 7 :
- 3² + 2 * 7 = 5
b. - x² + 2y
Si x = - 3 et y = - 8 :
- (- 3)² + 2 * (- 8) = - 25
Bonjour,
Calculer pur
x= 4 => (3(4)+1)(6-(4))= (12+1)(2)= 13(2)= 26
x= -2 => (3(-2)+1)(6-(-2))= (-6+1)(6+2)= -5(8)= -40
x= 5/6=> (3(5/6)+1)(6-5/6)=(5/2+1)(6-5/6)= (5/2+1*2/2)(6*6/65/6)=7/2(31/6)=217/12
calculer pour
x= 3 et y= 7
-(3)²+2(7)= -9+14= 5
x= -3 et y= -8
-(3)²+2(7)= -9+14=5
x= -3 et y= -8
-(-3)²+2(-8)= -9-16= -25