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Salut59
@Salut59
April 2019
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AIder MOI SVP LUI QUI TROUVE JLUI DONNE 20 POINT!!!
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nonotata
Bonsoir
(2-5x)(4x+3) -(2-5x)²
8x+6-20x²-15x -(4-20x+25x²)
-20x²-7x+6 -25x²+20x-4
-45x² +13x +2
pourx = -1
-45(-1)² +13(-1) +2
-45 x1 -13+2
-45-13+2
-58+2
-56
51² =(50+1)² = 2500 +100 +1 = 2601
69 ² = (70 -1 )² = 4900 -140 +1 = 4761
23x17 = (20+3)(20-3) = 20²-3² = 400 -9 = 391
(x+3)² = x²+x+9
(2x-5)² = 4x²-20x+25
(7x+8)(7x-8) = 49x²-64
1 votes
Thanks 1
Salut59
MERCI BCP!!!!!
Salut59
:)
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Salut59
January 2021 | 0 Respostas
AIDER MOI SVP !!!! jdonne 20 points
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Salut59
April 2019 | 0 Respostas
AIDER MOI JEN PEUX PLUS!!!!!!!!!!!!!
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Salut59
April 2019 | 0 Respostas
Aider moi svp..!!!!! :'( merci.. bon weekend..
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Salut59
April 2019 | 0 Respostas
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(2-5x)(4x+3) -(2-5x)²
8x+6-20x²-15x -(4-20x+25x²)
-20x²-7x+6 -25x²+20x-4
-45x² +13x +2
pourx = -1
-45(-1)² +13(-1) +2
-45 x1 -13+2
-45-13+2
-58+2
-56
51² =(50+1)² = 2500 +100 +1 = 2601
69 ² = (70 -1 )² = 4900 -140 +1 = 4761
23x17 = (20+3)(20-3) = 20²-3² = 400 -9 = 391
(x+3)² = x²+x+9
(2x-5)² = 4x²-20x+25
(7x+8)(7x-8) = 49x²-64