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Alinamaria123
a fost răspuns

Scoateţi factor comun: (x+2)(3x-7)-(x+2)(4x-2)+3(x+2) ; (5x-4)(3x-2)²-(3x-2)³+2(x+4)(3x-2)²

Răspuns :

Ralucaraican
(x+2)[(3x-7)-(4x-2)+3]=
=(x+2)(3x-7-4x+2+3)=
=(x+2)(-x-2)=
=-x²-2x-2x-4=
=-x²-4x-4

(3x-2)² (5x-4-3x+2+2x+8)=
=(3x-2)² (4x+6)=
=(9x²-12x+4)(4x+6)=
=36x³+54x²-48x²-72x+16x+24=
36x³+6x²-56x+24


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