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Directioner6210
@Directioner6210
April 2019
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S'il vous plaît, j'ai VRAIMENT besoin d'aide, c'est pour demain et je comprend ABSOLUMENT rien a sa. ._.
Factoriser chaque expression à l'aide d'une identité remarquable.
O=25a²+10a+1 ; P= 16a²+24a+9 ; Q=4y²+4y+1 ; R=1+20y+100y²
A= 16y²-8y+1 ; B=36y²-24y+4 ; C=25-30x+9x² ; D=9-48x+64x²
I=25a²-1 ; J=36x²-49 ; K=4-81y² ; L=16-64b²
Merci d'avance. ♥
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Commentaires (2)
Bonsoir
O =25a² + 10a + 1
= (5a)² + 2*5a + 1²
= (5a + 1)²
P = 16a² + 24a + 9
= (4a + 3)²
Q = 4y² + 4y + 1
= (2y + 1)²
R = 1 + 20y + 100y²
= (1 + 10y)²
A = 16y² - 8y + 1
= (4y - 1)²
B = 36y² - 24y + 4
= (6y - 2)²
C = 25 - 30x + 9x²
= (5 - 3x)²
D = 9 - 48x + 64x²
= (3 - 8x)²
I = 25a² -1
= (5a)² - 1²
= (5a - 1)(5a + 1)
J = 36x² - 49
= (6x - 7)(6x + 7)
K = 4 - 81y²
= (2 - 9y)(2 + 9y)
L = 16 - 64b²
= (4 - 8b)(4 + 8b)
1 votes
Thanks 2
Directioner6210
Merci beaucoup. Bonne soirée. :) xx
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O =25a² + 10a + 1
= (5a)² + 2*5a + 1²
= (5a + 1)²
P = 16a² + 24a + 9
= (4a + 3)²
Q = 4y² + 4y + 1
= (2y + 1)²
R = 1 + 20y + 100y²
= (1 + 10y)²
A = 16y² - 8y + 1
= (4y - 1)²
B = 36y² - 24y + 4
= (6y - 2)²
C = 25 - 30x + 9x²
= (5 - 3x)²
D = 9 - 48x + 64x²
= (3 - 8x)²
I = 25a² -1
= (5a)² - 1²
= (5a - 1)(5a + 1)
J = 36x² - 49
= (6x - 7)(6x + 7)
K = 4 - 81y²
= (2 - 9y)(2 + 9y)
L = 16 - 64b²
= (4 - 8b)(4 + 8b)