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maxlen1395
@maxlen1395
January 2021
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Bonjour j'ai besoin de votre aide pour faire mon exercice de maths je sais que ça va prendre du temps mais aidez moi C pour demain merci d'avance
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calinizou
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Hello !
A = (x+8)(x+10)
= x*x + x*10 + 8*x + 8*10
= x² + 10x + 8x +80
= x² + 18x + 80
B = (4x+3)(5x+2)
= 4x*5x + 4x*2 + 3*5x + 3*2
= 20x² + 8x + 15x + 6
= 20x² + 23x + 6
C = (x+5)(3x+1)
= x*3x + x*1 + 5*3x + 5*1
= 3x² + x + 15x + 5
= 3x² + 16x + 5
...etc....etc....etc....
c'est toujours la même chose : double distribution
à la fin, ça change un tout petit peu.....
K = (3t-7)² + (t-6)(t+2)
= (3t)² - 2*7*3t + 7² + t*t + t*2 - 6*t - 6*2
= 9t² - 42t + 49 + t² + 2t - 6t - 12
= 10t² - 46t + 37
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Hello !A = (x+8)(x+10)
= x*x + x*10 + 8*x + 8*10
= x² + 10x + 8x +80
= x² + 18x + 80
B = (4x+3)(5x+2)
= 4x*5x + 4x*2 + 3*5x + 3*2
= 20x² + 8x + 15x + 6
= 20x² + 23x + 6
C = (x+5)(3x+1)
= x*3x + x*1 + 5*3x + 5*1
= 3x² + x + 15x + 5
= 3x² + 16x + 5
...etc....etc....etc....
c'est toujours la même chose : double distribution
à la fin, ça change un tout petit peu.....
K = (3t-7)² + (t-6)(t+2)
= (3t)² - 2*7*3t + 7² + t*t + t*2 - 6*t - 6*2
= 9t² - 42t + 49 + t² + 2t - 6t - 12
= 10t² - 46t + 37