√(x²-4x+4)+√(x²-6x+9)=√(x-2)²+√(x-3)²=|x-2|+|x-3|2≤x≤3 x-2≥0 |x-2|=x-2x-3≤0 |x-3|=3-x√(x²-4x+4)+√(x²-6x+9)=|x-2|+|x-3|=x-2+3-x=1