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Sagot :

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A = 6 xy  = 6 * x + 6 * y

B  = 5 y²  = 5 * y * y

C  = ( 7 t + 3 ) ( 2 x + 5 ) =  ( 7 * t + 3 ) ( 2 * x + 5 )

D = 3 ( 5 y - 2 ) + 2 xy  = 3 ( 5 * y - 2 ) + 2 *x + 2 * y

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