Factoriser et Developper
1) Factoriser chaque expression en mettant en évidence le facteur commun:
A = (5x + 7) + (x - 1 ) (5x + 7)
B = (4x - 3)² - (2x -1) (4x - 3)
C = 14x² - 21x avec x positif
2) Developper.
A = (x - 1) (x + 2)
B = (x - 3)²
C = (x + 3)² - 4(2 - x) (2 + x)
1) Factoriser chaque expression en mettant en évidence le facteur commun:
A = (5x + 7) + (x - 1 ) (5x + 7)
B = (4x - 3)² - (2x -1) (4x - 3)
C = 14x² - 21x avec x positif
2) Developper.
A = (x - 1) (x + 2)
B = (x - 3)²
C = (x + 3)² - 4(2 - x) (2 + x)
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Verified answer
1)A=(5x+7)(1+x-1)
A=(5x+7)(x)
A=x(5x+7)
B=(4x-3)(4x-3-2x+1)
B=(4x-3)(2x-2)
B=2(4x-3)(x-1)
C=7x(2x-3)
2)
A=x^2+2x-x-2=x^2+x-2
B=x^2-6x+9
C=x^2+6x+9-4(4-x^2)
C=x^2+6x+9-16+4x^2
C=5x^2+6x-7
A = (5x + 7) + (x - 1 ) (5x + 7)
A = (5x+7)(1+x-1) = (5x+7)x
B = (4x - 3)² - (2x -1) (4x - 3)
B = (4x-3)(4x-3-2x+1) = (4x-3)(2x-2)
C = 14x² - 21x avec x positif
C = x(14x-21)
A = (x - 1) (x + 2)
A = x² + 2x - x - 2 = x² + x - 2
B = (x - 3)²
B = x² - 6x + 9
C = (x + 3)² - 4(2 - x) (2 + x)
C = x² + 6x + 9 + (- 8 + 4x) (2+x)
C = x² + 6x + 9 - 16 - 8x + 8x + 4x²
C = 5x² +6x -7
Bonne soirée.