Bonjour,
(y - 2 )² + ( y - 4 ) ( y + 4) = y²-4y+4 + (y²-4²)
= 2y²-4y-12
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Bonjour,
(y - 2 )² + ( y - 4 ) ( y + 4) = y²-4y+4 + (y²-4²)
= 2y²-4y-12