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camille2206
@camille2206
June 2021
2
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Bonjour j ai un dm et je n arrive pas a faire les deux equations :
-3(x+2)+(-x+2)(x-1) et l autre est 4x-(x-2)(x+3)
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shanaclaes98
-3(x+2)+(-x+2)(x-1)
-3x-6+(-x²+x+2x-2)
-3x-6-x²+x+2x-2
-x²-8
4x-(x-2)(x+3)
4x-(x²+3x-2x-6)
4x-x²-3x+2x+6
-x²-3x+6
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camille2206
merci :)
MrEagle
= -3 ( x + 2 ) + ( -x + 2 ) ( x - 1 )
= -3 * x - 3 * 2 - x * x - x * (-1) + 2 * x + 2 * (-1)
= -3x - 6 - x^2 + 1x + 2x - 2
= -x^2 - 8
= 4x - ( x - 2 ) ( x + 3 )
= 4x - x * x + x * 3 - 2 * x - 2 * 3
= 4x - x^2 + 3x - 2x - 6
= -x^2 + 5x - 6
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Bonjour j ai un dm et je n arrive pas a resoudre une equation : 3x+2=5x-6Merci d avance :)
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-3x-6+(-x²+x+2x-2)
-3x-6-x²+x+2x-2
-x²-8
4x-(x-2)(x+3)
4x-(x²+3x-2x-6)
4x-x²-3x+2x+6
-x²-3x+6
= -3 * x - 3 * 2 - x * x - x * (-1) + 2 * x + 2 * (-1)
= -3x - 6 - x^2 + 1x + 2x - 2
= -x^2 - 8
= 4x - ( x - 2 ) ( x + 3 )
= 4x - x * x + x * 3 - 2 * x - 2 * 3
= 4x - x^2 + 3x - 2x - 6
= -x^2 + 5x - 6