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Eli3
@Eli3
April 2019
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Bonjour aidé moi svp
Factoriser et réduire si possible les expressions suivantes en précisant la propriété utilisée.
a)x²-16
b) 25-(y+1)²
c)(b+4)²-(-b+2)²
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winner123
Verified answer
Bonjour
a. x² - 16 = ( x - 4) ( x + 4) = identité remarquable
b. 25 - ( y + 1)² = ( 5 + y + 1) ( 5 - y - 1) = ( y + 6) ( - y + 4) = idem
3. ( b +4)² - ( - b + 3)² = ( b +4 - b +3) ( b +4 + b -3) = 7 (2 x + 1) = idem
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Bonjour pouvez vous m'aider svp svp!!
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Verified answer
Bonjoura. x² - 16 = ( x - 4) ( x + 4) = identité remarquable
b. 25 - ( y + 1)² = ( 5 + y + 1) ( 5 - y - 1) = ( y + 6) ( - y + 4) = idem
3. ( b +4)² - ( - b + 3)² = ( b +4 - b +3) ( b +4 + b -3) = 7 (2 x + 1) = idem