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Sagot :

XXX102

Bonjour,

 

[tex](2x+3)(x-5) = 2x(x-2)\\ 2x^2-7x-15 = 2x^2-4x\\ -7x-15 = -4x\\ -3x = 15\\ x=-5[/tex]

[tex]16x^2-74x+9 = 16x^2+24x+9\\ -74x = 24x\\ x=0[/tex]

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