bonjour
( x + 1 )² + 7 x ( 2 - x )
= x² + 2 x + 1 + 14 x - 7 x²
= - 6 x² + 16 x + 1
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bonjour
( x + 1 )² + 7 x ( 2 - x )
= x² + 2 x + 1 + 14 x - 7 x²
= - 6 x² + 16 x + 1