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Sagot :

AENEAS

Bonjour,

on a A(x) = (x-1)(2x+1)-2(x+2)²

A(x) = 2x² + x - 2x - 1 -2(x²+4x+4)

A(x) = 2x² -x - 1 -2x²-8x-8

A(x) = -9x - 9

VINS

Bonjour

( x - 1 ) ( 2 x + 1 ) - 2 ( x + 2 )²

= 2 x² + x - 2 x - 1 - 2 ( x² + 4 x + 4 )

= 2 x² - x - 1 - 2 x² - 8 x - 8

=  - 9 x - 9

= - 9 ( x + 1 )

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