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( x + 4 )² = x² + 8 x + 16

(10 x - 5 )²= 100 x² - 100 x + 25

( 2 x + 3 )² = 4 x² + 12 x + 9

( x + 6 ) ( x - 6 ) = x² - 36

( x + 4 ) ( x - 4 ) = x² - 16

( 7 x + 1) ( 7 x - 1 ) = 49 x² - 1

ISRAE5

Réponse:

a) (x+4)²=x²+8x+16

b) (10x-5)²=100x²-100x+25

c) (2x+3)²=4x²+12x+9

d) (x-4)(x+4)=x²-16

e) (7x+1)(7x-1)=49x²-1

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