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HelpeurMath
@HelpeurMath
June 2021
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[[[HEELPP]]] ! Jai besoin de vos talents !
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Cissy
1) A = (x - 6)² - (x - 4) (x - 9)
A = (x - 6)² + (-x + 4) (x - 9)
A = x² - 12x + 36 - x² + 9x + 4x - 36
A = x² - x² - 12x + 9x + 4x + 36 - 36
A = -12x + 9x + 4x
A = x
2) 9 994² - 9 996 × 9 991 = (10 000 - 6)² - (10 000 - 4) (10 000 - 9)
Avec x = 10 000 d'après la question 1 : 9 994² - 9 996 × 9 991 = 10 000
3) 124 124 124 118² - 124 124 124 120 × 124 124 124 115
= (124 124 124 124 - 6)² - (124 124 124 124 - 4) (124 124 124 124 - 9)
Avec x = 124 124 124 124 d'après la question 1 : 124 124 124 118² - 124 124 124 120 × 124 124 124 115 = 124 124 124 124
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A = (x - 6)² + (-x + 4) (x - 9)
A = x² - 12x + 36 - x² + 9x + 4x - 36
A = x² - x² - 12x + 9x + 4x + 36 - 36
A = -12x + 9x + 4x
A = x
2) 9 994² - 9 996 × 9 991 = (10 000 - 6)² - (10 000 - 4) (10 000 - 9)
Avec x = 10 000 d'après la question 1 : 9 994² - 9 996 × 9 991 = 10 000
3) 124 124 124 118² - 124 124 124 120 × 124 124 124 115
= (124 124 124 124 - 6)² - (124 124 124 124 - 4) (124 124 124 124 - 9)
Avec x = 124 124 124 124 d'après la question 1 : 124 124 124 118² - 124 124 124 120 × 124 124 124 115 = 124 124 124 124