a. ( x -2)(3+ x ) b. (4+ x )(1- x ) c. ( x -5)(4- x ) d. (-2- x )( x -7)
Mathématiques
emelinebauche
Question
a. (x-2)(3+x)
b. (4+x)(1-x)
c. (x-5)(4-x)
d. (-2-x)(x-7)
b. (4+x)(1-x)
c. (x-5)(4-x)
d. (-2-x)(x-7)
1 Réponse
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1. Réponse amykim12
A = (x-2)(3+x)
= 3x + x² - 6 - 2x
A = x² + x - 6
B = (4+x)(1-x)
= 4 - 4x + x - x²
B = -x² - 3x + 4
C = (x-5)(4-x)
= 4x - x² - 20 + 5x
C = -x² + 9x - 20
D = (-2-x)(x-7)
= -2x + 14 - x² + 7x
D = -x² + 5x + 14