bonjour
A = 15 x² - 15 x - 6 x² + 9
= 9 x² - 15 x + 9
B = 20 x - 8 x² + 15 - 6 x - 20 x² + 28 x
= - 28 x² + 42 x + 15
C = 20 x² - 8 x - 15 x + 6 - ( 21 x - 6 x² + 49 - 14 x )
= 20 x² - 23 x + 6 - 21 x + 6 x² - 49 + 14 x
= 26 x² -30 x - 43
d = 9 x² + 24 x + 16
F = 3 x² / 7 + 3 x / 9 - 2 x /21 - 2 /27
= 81 x² / 189 + 63 x / 189 - 18 x /189 - 14/189
= 81 x² + 45 x - 14
Réponse :
Explications étape par étape
A = 3x(5x-5)-3(2x²-3)
A = 15x²-15x-6x²+9
A = 9x²-15x+9
B = (4x+3)(5-2x)-4x(5x-7)
B = 20x-8x²+15-6x-20x²+28x
B = -28x²+42x+15
C = (4x-3)(5x-2)-(3x+7)(7-2x)
C = 20x²-8x-15x+6-(21x-6x²+49-14x)
C = 20x²-23x+6 +6x²-7x-49
C = 26x²-30x-43
D = (3x+4)²
D = 9x²+24x+16
F = (3x-2/3)(x/7+1/9)
F = 3x²/7+3x/9-2x/21-2/27
F = 3x²/7 +5x/21-2/27
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bonjour
A = 15 x² - 15 x - 6 x² + 9
= 9 x² - 15 x + 9
B = 20 x - 8 x² + 15 - 6 x - 20 x² + 28 x
= - 28 x² + 42 x + 15
C = 20 x² - 8 x - 15 x + 6 - ( 21 x - 6 x² + 49 - 14 x )
= 20 x² - 23 x + 6 - 21 x + 6 x² - 49 + 14 x
= 26 x² -30 x - 43
d = 9 x² + 24 x + 16
F = 3 x² / 7 + 3 x / 9 - 2 x /21 - 2 /27
= 81 x² / 189 + 63 x / 189 - 18 x /189 - 14/189
= 81 x² + 45 x - 14
Réponse :
bonjour
Explications étape par étape
A = 3x(5x-5)-3(2x²-3)
A = 15x²-15x-6x²+9
A = 9x²-15x+9
B = (4x+3)(5-2x)-4x(5x-7)
B = 20x-8x²+15-6x-20x²+28x
B = -28x²+42x+15
C = (4x-3)(5x-2)-(3x+7)(7-2x)
C = 20x²-8x-15x+6-(21x-6x²+49-14x)
C = 20x²-23x+6 +6x²-7x-49
C = 26x²-30x-43
D = (3x+4)²
D = 9x²+24x+16
F = (3x-2/3)(x/7+1/9)
F = 3x²/7+3x/9-2x/21-2/27
F = 3x²/7 +5x/21-2/27