Développe et réduis les expressions suivantes : A = 3(-2x + 5) + (-2x + 5) (x - 3) = B = (2a - 5) (3 - 4a) -2 (5 - a) = C = (3 - 4z) (z - 2) = D = 5r (2 - 3r) +
Mathématiques
Ayano93
Question
Développe et réduis les expressions suivantes :
A = 3(-2x + 5) + (-2x + 5) (x - 3) =
B = (2a - 5) (3 - 4a) -2 (5 - a) =
C = (3 - 4z) (z - 2) =
D = 5r (2 - 3r) + (-r - 2) (2r + 5) =
A = 3(-2x + 5) + (-2x + 5) (x - 3) =
B = (2a - 5) (3 - 4a) -2 (5 - a) =
C = (3 - 4z) (z - 2) =
D = 5r (2 - 3r) + (-r - 2) (2r + 5) =
2 Réponse
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1. Réponse aur70
bonjour
A = 3(-2x + 5) + (-2x + 5) (x - 3)
A=-6x+15-2x²+6x+5x-15
A=-2x²+5x
B = (2a - 5) (3 - 4a) -2 (5 - a)
B=6a-8a²-15+20a-10+2a
B=-8a²+28a-25
C = (3 - 4z) (z - 2)
C=3z-6-4z²+8z
C=-4z²+11z-6
D = 5r (2 - 3r) + (-r - 2) (2r + 5)
D=10r-15r²-2r²-5r-4r-10
D=-17r²+r-10 -
2. Réponse inequation
Bonjour,
A = 3(-2x + 5) + (-2x + 5) (x - 3)
A= -6x+15-2x²+6x+5x-15
A= -2x²+5x
B = (2a - 5) (3 - 4a) -2 (5 - a)
B= -8a²+28a-25
C = (3 - 4z) (z - 2)
C= -4z²+11z-6
D = 5r (2 - 3r) + (-r - 2) (2r + 5)
D= 10r-15r²-2r²-5r-4r-10
D= -17r²+r-10