Salut pouvais vous juste m aider a faire les mini exo de maths car je n arrive pas merci consignes : recopier chaque égalité en la complétant

c) 15a+20= ..... X3a+.... X ......= ..... ( 3a + ....)

d) -2-4t = -2 X .....-2 X .... = -2 X ( ....+ .....)

c) 9n au carré - 6n = 3n X .....- .... X ..... = 3n ( ...-....)

d) 8t au carré +6t +2 = 2 X .... + 2 X .....+ 2 X ..... = 2 X ( ....)
c) 7x -x = .... X x - .... X x = ( .... - .... ) X x = ....

d) 3, 5y + y = .... X y + ..... X y = ( .... + .... ) X y = .....
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