Réponse :
x -2 -1 0 1 2
-3x + 5 11 8 5 2 -1
2x + 3 -1 1 3 5 7
(-3x+5)(2x + 3) - 11 8 15 10 -7
Explications étape par étape
Avec -3x + 5 :
-3(-2) + 5 = 6 + 5 = 11
-3(-1) + 5 = 3 + 5 = 8
-3(0) + 5 = 0 + 5 = 5
-3(1) + 5 = -3 +5 = 2
-3(2) + 5 = -6 + 5 = -1
Avec 2x + 3 :
2(-2) + 3 = -4 + 3 = -1
2(-1) + 3 = -2 + 3 = 1
2(0) + 3 = 0 + 3 = 3
2(1) + 3 = 2 + 3 = 5
2(2) + 3 = 4 + 3 = 7
Avec (-3x + 5)(2x + 3) :
((-3)x (-2) + 5)) ((2) x (-2) + 3))
= (6 + 5) (- 4 + 3)
= (11) (-1)
= - 11
((-3) x (-1) + 5)) ((2) x (-1) + 3))
= (3 + 5) (-2 + 3)
= (8) (1)
= 8
((-3) x (0) + 5)) ((2) x (0) + 3))
= (0 + 5) (0 + 3)
= (5) (3)
= 15
((-3) x (1) + 5)) ((2) x (1) + 3))
= ( -3 + 5) (2 + 3)
= (2) (5)
= 10
((-3) x (2) + 5)) ((2) x (2) + 3))
= ( -6 + 5) (4 + 3)
= (-1) (7)
= -7
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Réponse :
x -2 -1 0 1 2
-3x + 5 11 8 5 2 -1
2x + 3 -1 1 3 5 7
(-3x+5)(2x + 3) - 11 8 15 10 -7
Explications étape par étape
Avec -3x + 5 :
-3(-2) + 5 = 6 + 5 = 11
-3(-1) + 5 = 3 + 5 = 8
-3(0) + 5 = 0 + 5 = 5
-3(1) + 5 = -3 +5 = 2
-3(2) + 5 = -6 + 5 = -1
Avec 2x + 3 :
2(-2) + 3 = -4 + 3 = -1
2(-1) + 3 = -2 + 3 = 1
2(0) + 3 = 0 + 3 = 3
2(1) + 3 = 2 + 3 = 5
2(2) + 3 = 4 + 3 = 7
Avec (-3x + 5)(2x + 3) :
((-3)x (-2) + 5)) ((2) x (-2) + 3))
= (6 + 5) (- 4 + 3)
= (11) (-1)
= - 11
((-3) x (-1) + 5)) ((2) x (-1) + 3))
= (3 + 5) (-2 + 3)
= (8) (1)
= 8
((-3) x (0) + 5)) ((2) x (0) + 3))
= (0 + 5) (0 + 3)
= (5) (3)
= 15
((-3) x (1) + 5)) ((2) x (1) + 3))
= ( -3 + 5) (2 + 3)
= (2) (5)
= 10
((-3) x (2) + 5)) ((2) x (2) + 3))
= ( -6 + 5) (4 + 3)
= (-1) (7)
= -7