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Lucasmartel21
@Lucasmartel21
April 2019
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Urgent exercice 2 merci tout le monde !
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maudmarine
Verified answer
A = (4x - 5) (4x + 5)
A = 16x² + 20x - 20x - 25
A = 16x² - 25
B = (7x + 3) (6x - 8)
B = 42x² - 56x + 18x - 24
B = 42x² - 38x - 24
C = 2x - (2x + 1) (3x - 5)
C = 2x - (6x² - 10x + 3x - 5)
C = 2x - 6x² + 10x - 3x + 5
C = - 6x² + 9x + 5
D = (2x - 7)²
D = 4x² - 28x + 49
1 votes
Thanks 1
tychris31
A) 4x(4x+5)-5(4x+5)
16x^2+20x-20x-25
16x^2-25
b)7x(6x-8)+3(6x-8)
42x^2-56x+18x-24
42x^2-38x-24
c)2x-(2x(3x-5)+1(3x-5))
2x-6x^2+10x-3x+5
d) (2x)^2-2*2x*-7+(-7)^2
4x^2+28x+49
0 votes
Thanks 1
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Verified answer
A = (4x - 5) (4x + 5)A = 16x² + 20x - 20x - 25
A = 16x² - 25
B = (7x + 3) (6x - 8)
B = 42x² - 56x + 18x - 24
B = 42x² - 38x - 24
C = 2x - (2x + 1) (3x - 5)
C = 2x - (6x² - 10x + 3x - 5)
C = 2x - 6x² + 10x - 3x + 5
C = - 6x² + 9x + 5
D = (2x - 7)²
D = 4x² - 28x + 49
16x^2+20x-20x-25
16x^2-25
b)7x(6x-8)+3(6x-8)
42x^2-56x+18x-24
42x^2-38x-24
c)2x-(2x(3x-5)+1(3x-5))
2x-6x^2+10x-3x+5
d) (2x)^2-2*2x*-7+(-7)^2
4x^2+28x+49