bonsoir
A = 3 ( x + y )
B = ( 2 x + 1 ) ( x + 4 + 3 x + 2 )
= ( 2 x + 1 ) ( 4 x + 6 )
= 2 ( 2 x + 1 ) ( 2 x + 3 )
C = ( x + 25 )²
D = ( x - 7 ) ( x + 7 )
E = ( x + 7 ) ( x + 7 - 3 x + 5 )
= ( x + 7 ) ( - 2 x + 12 )
= 2 ( x + 7 ) ( - x + 6 )
F = ( 2 x + 1 - 5 ) ( 2 x + 1 + 5 )
= ( 2 x - 4 ) ( 2 x + 6 )
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bonsoir
A = 3 ( x + y )
B = ( 2 x + 1 ) ( x + 4 + 3 x + 2 )
= ( 2 x + 1 ) ( 4 x + 6 )
= 2 ( 2 x + 1 ) ( 2 x + 3 )
C = ( x + 25 )²
D = ( x - 7 ) ( x + 7 )
E = ( x + 7 ) ( x + 7 - 3 x + 5 )
= ( x + 7 ) ( - 2 x + 12 )
= 2 ( x + 7 ) ( - x + 6 )
F = ( 2 x + 1 - 5 ) ( 2 x + 1 + 5 )
= ( 2 x - 4 ) ( 2 x + 6 )