Maths svp Réduire si possible exercice 1.... Pergunta de ideia deLouLouis8

April 2019 1 54 Report

Maths svp
Réduire si possible exercice 1

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Bonsoir,

2)
A = 2 (x + 6)
A = 2x + 12

B = 3y (5 + 2)
B = 15y + 6y
B = 21y

C = - 2x (5 - 3x)
C = - 10x + 6x²
C = 6x² - 10x

D = (4 + 2x) (5x + 3)
D = 20x + 12 + 10x² + 6x
D = 10x² + 20x + 6x + 12
D = 10x² + 26x + 12

E = (4 - x) (3 + 2x)
E = 12 + 8x - 3x - 2x²
E = - 2x² + 8x - 3x + 12
E = - 2x² + 5x + 12

3)
Calcule A et B pour x = 3
A = x² - x
A = 3² - 3
A = 9 - 3
A = 6

B = (2x + 4) (x - 3)
B = (2 * 3 + 4) (3 - 3)
B = (6 + 4) (0)
B = 10 * 0
B = 0

Calcule A et B pour x = - 2
A = x² - x
A = - 2² - (- 2)
A = 4 + 2
A = 6

B = (2x + 4) (x - 3)
B = (2 * (- 2) + 4) (- 2 - 3)
B = (- 4 + 4) (- 5)
B = 0 * (- 5)
B = 0

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