bonjour, Bonsoir Développer A= -6 (6x - 10) B= (x + 7) × (-8x) D= (-10x +9) × 6x F= 9 (4x - 10) H= 9(4x - 2) Merci d'avance

Bonsoir,

A = -6( 6x - 10 )

A = ( -6 * 6x ) - ( -6 * 10 )

A = -36x - (-60)

B = ( x + 7 ) * (-8x)

B = ( x * -8x ) + ( -8x * 7 )

B = -8x² + -56x

D = ( -10x + 9 ) * 6x

D = ( -10x * 6x ) + ( 9 * 6x )

D = -60x² + 54x

F = 9( 4x - 10 )

F = ( 9 * 4x ) - ( 10 * 9 )

F = 36x - 90

H = 9( 4x - 2 )

H = ( 9 * 4x ) - ( 9 * 2 )

H = 36x - 18

Bonne soirée ! :)