Bonsoir, je suis en première S, pouvez-vous me résoudre ses calculs afin que je comprennent mieux svp? ( (2) signifie au carré pour info...)

* 7(x+1)(x+4)
* (169x(2) - 4) + (-7x + 9)(13x+2)
* (5x+12) (8x+9) - (9x+2) (13x+14)
* (7x+9) (7x-2) + (11x+10) (8x-3)
* (-24x+30) + (-13x+9) (-8x+10)=0
* (-10x-9)(2) +(12x+7) (-10x-9)
* (12x+13)(2) +(11x-9) (12x+13)=0
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