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Sagot :

= 3*( 12+ x) * (5+x)

=3* (60+12x+5x+x²)

=3* (60+17x+x²)

= 3x² + 51x + 180

Réponse :

Explications étape par étape

3 x ( 2x6 + X) x ( 5+X)

3[( 2x6 + X) x ( 5+X)]

3[(12+X)(5+X)]

3[12x5+12xX+Xx5+XxX]

3[60+12X+5X+X^2]

3[60+17X+X^2]

3x60+3x17X+3xX^2

180+51X+3X^2

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