Développer et réduire chaque expréssion : A = ( 2x - 5) (3 - x) B = (3x - 4)² C = (4x + 9) (4x - 9) D = (9 + 5x)² E = (5x - 2)² + (x - 7) (5x + 2)
Mathématiques
kikikiren
Question
Développer et réduire chaque expréssion :
A = ( 2x - 5) (3 - x)
B = (3x - 4)²
C = (4x + 9) (4x - 9)
D = (9 + 5x)²
E = (5x - 2)² + (x - 7) (5x + 2)
A = ( 2x - 5) (3 - x)
B = (3x - 4)²
C = (4x + 9) (4x - 9)
D = (9 + 5x)²
E = (5x - 2)² + (x - 7) (5x + 2)
2 Réponse
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1. Réponse Anonyme
A = ( 2x - 5) (3 - x)
=6x-15-2x²+5x
=-2x²+11x-15
B = (3x - 4)²
=9x²-24x+16
C = (4x + 9) (4x - 9)
=16x²-81
D = (9 + 5x)²
=25x²+90x+81
E = (5x - 2)² + (x - 7) (5x + 2)
=25x²-20x+4+5x²+2x-35x-14
=30x²-53x-10 -
2. Réponse Aftershock
A = (2x -5)(3-x)
A = 6x-2x²-15+5x
A = -2x²+11x-15
B = (3x-4)²
B = 9x²-24x+16
C = (4x+9)(4x-9)
C = 16x²-36x+36x-81
C = 16x²-81
D = (9+5x)²
D = 81+90x+25x²
D = 25x²+90x+81
E = (5x-2)²+(x-7)(5x+2)
E = 25x²-20x+4+5x²+2x-35x-14
E = 30x²-53x-10