Réponse:
Bonjour,
Développer les expressions:
c. 6(5x-2)(5x+2) - 3(x+6)(x+6)= 6(25x²-10x+10x-4)-3(x²+6x+6x+36)
= 6(25x²-4) - 3(x²+12x+36)
= 150x²-24-3x²-36x-108
= 147x²-36x-132
d. (2x+3)(3x-4)= 6x²+9x-8x-12
= 6x²+x-12
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Réponse:
Verified answer
Bonjour,
Développer les expressions:
c. 6(5x-2)(5x+2) - 3(x+6)(x+6)= 6(25x²-10x+10x-4)-3(x²+6x+6x+36)
= 6(25x²-4) - 3(x²+12x+36)
= 150x²-24-3x²-36x-108
= 147x²-36x-132
d. (2x+3)(3x-4)= 6x²+9x-8x-12
= 6x²+x-12