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(4x-3)~2-(3x-2)~2+(2x+5)~2

~2= la puterea a doua


Răspuns :

(4x-3)²-(3x-2)²+(2x+5)²=
=16x²-24x+9-9x²+12x-4+4x²+20x+25=
=11x²+8x+30