Exercice 1: Développer et réduire chaque expression. A = (9x - 8) X (-6x + 5) B = (8x - 6)-(-11x -9) C = 2x + 3x(-8x + 12) D =(3x + 6)² E = (7x – 9)x(9+ 7x) F =
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magazsafia
Question
Exercice 1: Développer et réduire chaque expression.
A = (9x - 8) X (-6x + 5)
B = (8x - 6)-(-11x -9)
C = 2x + 3x(-8x + 12)
D =(3x + 6)²
E = (7x – 9)x(9+ 7x)
F = (9x - 2)²
Merci d'avance
A = (9x - 8) X (-6x + 5)
B = (8x - 6)-(-11x -9)
C = 2x + 3x(-8x + 12)
D =(3x + 6)²
E = (7x – 9)x(9+ 7x)
F = (9x - 2)²
Merci d'avance
1 Réponse
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1. Réponse hirondelle52
Bonjour,
A = (9x - 8) X (-6x + 5)
= -54x² +45x +48x -40
= -54x² + 93x-40
B = (8x - 6)-(-11x -9)
= 8x - 6+11x + 9
= 19x +3
C = 2x + 3x(-8x + 12)
2x - 24x² + 36x
= -24x² +38x
D =(3x + 6)²
IR
= 9x²+36x +36
E = (7x – 9)x(9+ 7x)
IR
= 63x +49x²-81 -63x
= 49x² -81
F = (9x - 2)²
IR
= 81x² -36x +4