Bonjour,
E=(3x+2)²-(5-2x) (3x+2)
=9x²+12x+4-15x-10+6x²+4x
E=15x²+x-6
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Bonjour,
E=(3x+2)²-(5-2x) (3x+2)
=9x²+12x+4-15x-10+6x²+4x
E=15x²+x-6