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Sagot :

A =(2x2-6x - 3x + 9) -10 + 8x

A = 2X2 -9x + 9 -10 +8 x

A = 2x2 - x - 1

LODIE
2x"-6x-3x+9-10+8x
2x"-x-1
( le " = au carrée)

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