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PierreLuis5
@PierreLuis5
May 2019
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A) 25-(y-1)²
b) (a+1)² - (2a-6)²
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Bonsoir ,
A-
= 25 - ( y² + 1² - 2y )
= 25 - y² - 1 + 2y
=
-y² + 2y + 24
B-
= a² + 1² + 2a - ( 4a² + 36 - 24a )
=a² + 1 + 2a - 4a² - 36 + 24a
=
-3a² + 26a - 35
.
2 votes
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A-
= 25 - ( y² + 1² - 2y )
= 25 - y² - 1 + 2y
= -y² + 2y + 24
B-
= a² + 1² + 2a - ( 4a² + 36 - 24a )
=a² + 1 + 2a - 4a² - 36 + 24a
= -3a² + 26a - 35 .