Réponse:
C = - 6 (5+ 9x) + 4 × ( 3x - 7 )
C= - 30 - 54x + 12x -23
C= -58 - 42x
D= 5+ 3y ( - 7y - 3 ) + 12y - 9
D= 5 - 21y² - 9y + 12x -9
D = -4 - 21y² + 3y
D = - 21y² + 3y - 4
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Verified answer
C= -6x5 -6x9x +4x3x-4x7=-58-33xD=5-3yx7y-3x3y+12y-9=5-21y-9y+12y-9=-4-18y
Réponse:
C = - 6 (5+ 9x) + 4 × ( 3x - 7 )
C= - 30 - 54x + 12x -23
C= -58 - 42x
D= 5+ 3y ( - 7y - 3 ) + 12y - 9
D= 5 - 21y² - 9y + 12x -9
D = -4 - 21y² + 3y
D = - 21y² + 3y - 4