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( 3x+2)(3x-2)-9(x+4)(x-1)​

Răspuns :

Răspuns:

(3x+2)(3x-2)=(3x)²-2²=9x²-4

-9(x+4)=-9x-36

Deci 9x²-4-9x-36(x-1)=9x²-4-9x-36x+36=9x²-45x+32