Question
bonsoir aider moi si vous plait très urgent
x et y sont deux nombres tels que xy=-4 et x-y=8.5
calculer:
A= (x-1)(y+1)
B= (x+4)(y-4)
C= (2x+1)(2y-1)
Asked by: USER7486
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192 Answers
Answer (192)
A = xy -y + x - 1 = xy + (x-y) -1 = 4 - 8,5 - 1 = -5,5
B = xy + 4y - 4x - 16 = xy - 4(x-y) - 16 = 4 - 34 - 16 = -46
c = 4xy - 2x + 2y - 1 = 4xy + 2(x-y) - 1 = 16 + 17 - 1 = 32
B = xy + 4y - 4x - 16 = xy - 4(x-y) - 16 = 4 - 34 - 16 = -46
c = 4xy - 2x + 2y - 1 = 4xy + 2(x-y) - 1 = 16 + 17 - 1 = 32
A = xy -y + x - 1 = xy + (x-y) -1 = 4 - 8,5 - 1 = -5,5
B = xy + 4y - 4x - 16 = xy - 4(x-y) - 16 = 4 - 34 - 16 = -46
c = 4xy - 2x + 2y - 1 = 4xy + 2(x-y) - 1 = 16 + 17 - 1 = 32
B = xy + 4y - 4x - 16 = xy - 4(x-y) - 16 = 4 - 34 - 16 = -46
c = 4xy - 2x + 2y - 1 = 4xy + 2(x-y) - 1 = 16 + 17 - 1 = 32