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(4x-3)²-(3x-2)²+(2x+5)²

(4x+3)(2x-5)-(2x+3)(3x-4)-(2x+1)(3x-2)=


Răspuns :

16x^2-24x+9-9x^2+12x-4+4x^2+20x+25=11x^2+8x+30

8x^2-20x+6x-15-(6x^2-8x+9x-12)-(6x^2-4x+3x-2)=8x^2-14x-15-6x^2-x+12-6x^2+x+2= -4x^2-14x-1
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