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A = 3 x +24 + 28 x + 8
= 31 x + 32
B = 5 x - 5 - 14 x - 21 x²
= - 21 x² - 9 x - 5
C = 8 x - 10 x² - x + 7
= - 10 x² + 7 x + 7
D = 3 - 8 x - 20 x + 35
= - 28 x + 38
E = 21 - 14 x - 8 x² + 4 x
= - 8 x² - 10 x + 21
f = 7 x - 10 + 45 x + 63 x - 7
= 115 x - 17
Réponse :
Explications étape par étape
Bonsoir
Developper :
A = 3(x + 8) + 4(7x + 2)
A = 3x + 24 + 28x + 8
A = 31x + 32
B = 5(x - 1) - 7x(2 + 3x)
B = 5x - 5 - 14x - 21x^2
B = -21x^2 - 9x - 5
C = 2x(4 - 5x) - (x - 7)
C = 8x - 10x^2 - x + 7
C = -10x^2 + 7x + 7
D = (3 - 8x) - 5(4x - 7)
D = 3 - 8x - 20x + 35
D = -28x + 38
E = 7(3 - 2x) - 4x(2x - 1)
E = 21 - 14x - 8x^2 + 4x
E = -8x^2 - 10x + 21
F = 7x - 5(2 - 9x) + 7(9x - 1)
F = 7x - 10 + 45x + 63x - 7
F = 115x - 17
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Verified answer
bonsoir
A = 3 x +24 + 28 x + 8
= 31 x + 32
B = 5 x - 5 - 14 x - 21 x²
= - 21 x² - 9 x - 5
C = 8 x - 10 x² - x + 7
= - 10 x² + 7 x + 7
D = 3 - 8 x - 20 x + 35
= - 28 x + 38
E = 21 - 14 x - 8 x² + 4 x
= - 8 x² - 10 x + 21
f = 7 x - 10 + 45 x + 63 x - 7
= 115 x - 17
Réponse :
Explications étape par étape
Bonsoir
Developper :
A = 3(x + 8) + 4(7x + 2)
A = 3x + 24 + 28x + 8
A = 31x + 32
B = 5(x - 1) - 7x(2 + 3x)
B = 5x - 5 - 14x - 21x^2
B = -21x^2 - 9x - 5
C = 2x(4 - 5x) - (x - 7)
C = 8x - 10x^2 - x + 7
C = -10x^2 + 7x + 7
D = (3 - 8x) - 5(4x - 7)
D = 3 - 8x - 20x + 35
D = -28x + 38
E = 7(3 - 2x) - 4x(2x - 1)
E = 21 - 14x - 8x^2 + 4x
E = -8x^2 - 10x + 21
F = 7x - 5(2 - 9x) + 7(9x - 1)
F = 7x - 10 + 45x + 63x - 7
F = 115x - 17