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Sagot :

Bonjour.

Simplifier :

= (3x+4)²-(1-2x)(6+x)

= 9x²+24x+16-(1-2x)(6+x)

= 9x²+24x+16-(6+x-12x-2x²)

= 9x²+24x+16-(6-11x-2x²)

= 9x²+24x+16-6+11x+2x²

= 11x²+24x+16-6+11x

= 11x²+35x+16-6

= 11x²+35x+10

Bonne soirée.

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