Răspuns:
-(5x²+2x-30)
Explicație pas cu pas:
(3x+1)2-5(x+2)(x-2)-4(x-1)2=
=6x+2-5(x²-2²)-(x-1)8
=6x+2-5x²+20-8x+8
=-2x+30-5x²
=-(5x²+2x-30)