Răspuns:
Explicație pas cu pas:4x^2-4x+1-4(x^2-2x+2x-4=25-10x+x^2-(x^2+x-3x-3)
4x^2-4x+1-4x^2+8x-8x+16=25-10x+x^2-x^2-x+3x+3
-4x+1+16=25-10x-x+3x+3
-4x+17=28-11x+3x
11x-3x-4x=28-17
4x=11
X=11/4
