Bonsoir,
Factoriser ses expressions :
1) t² - 1 = (t - 1) (t + 1)
2) 9a² - 4 = (3a - 2) (3a + 2)
3) (x-2)² - 36 = (x - 2 - 6) (x - 2 + 6) = (x - 8) (x + 4)
4) (3x+5)² - (x+8)²= (3x + 5 - x - 8) (3x + 5 + x + 8) = (2x - 3) (4x + 13)
Réponse:
1) t²-1=(t-1)(t+1)
2) 9a²-4=(3a-2)(3a+2)
3) (x-2)²-36=((x-2)-6)((x-2)+6)=(x-8)(x+4)
4) (3x+5)²-(x+8)²=((3x+5)-(x+8))((3x+5)+(x+8))=(3x+5-x-8)(3x+5+x+8)=(2x-3)(4x+13)
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Bonsoir,
Factoriser ses expressions :
1) t² - 1 = (t - 1) (t + 1)
2) 9a² - 4 = (3a - 2) (3a + 2)
3) (x-2)² - 36 = (x - 2 - 6) (x - 2 + 6) = (x - 8) (x + 4)
4) (3x+5)² - (x+8)²= (3x + 5 - x - 8) (3x + 5 + x + 8) = (2x - 3) (4x + 13)
Réponse:
1) t²-1=(t-1)(t+1)
2) 9a²-4=(3a-2)(3a+2)
3) (x-2)²-36=((x-2)-6)((x-2)+6)=(x-8)(x+4)
4) (3x+5)²-(x+8)²=((3x+5)-(x+8))((3x+5)+(x+8))=(3x+5-x-8)(3x+5+x+8)=(2x-3)(4x+13)