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leylakorkmaz
@leylakorkmaz
January 2021
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je ne sais pas comment il fait pour trouver aider moi svp c'est pour demain
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Bonsoir,
99²
= ( 100 - 1 )²
= 100² - 2×1×100 + 1²
= 10 000 - 200 + 1
= 9 801
105²
= ( 100 + 5 )²
= 100² + 2×5×100 + 5²
= 10 000 + 1 000 + 25
= 11 025
61 × 59
= ( 60 + 1 ) ( 60 - 1 )
= 60² - 1²
= 3 600 - 1
= 3 599
1 votes
Thanks 1
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leylakorkmaz
January 2021 | 0 Respostas
je n'arrive pas svp aider moi
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leylakorkmaz
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Leylakorkmaz
May 2019 | 0 Respostas
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Leylakorkmaz
May 2019 | 0 Respostas
Je n'arrive vraiment pas la question 2 et 3, c'est pour demain svp aidez-moi !
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Leylakorkmaz
May 2019 | 0 Respostas
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Verified answer
Bonsoir,99²
= ( 100 - 1 )²
= 100² - 2×1×100 + 1²
= 10 000 - 200 + 1
= 9 801
105²
= ( 100 + 5 )²
= 100² + 2×5×100 + 5²
= 10 000 + 1 000 + 25
= 11 025
61 × 59
= ( 60 + 1 ) ( 60 - 1 )
= 60² - 1²
= 3 600 - 1
= 3 599