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DAU CORONITA! Rezolvati in Z ecuatia (3x-5)(3x+5) - (x+2)²= (2x-3)²+ 4(x+5)²

Răspuns :

9x^2-25-x^2-4x-4=4x^2-12x+9+4× (x^2+10x+25)=
=8x^2-4x-4=8x^2+28x+109
=8x^2-8x^2-4x-28x=203
32x=-203
x=6,32