√x²-6x+9+√x²+2X+1(-1

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√x²-6x+9+√x²+2X+1(-1

√x²-6x+9+√x²+2X+1(-1
√x²-6x+9+√x²+2X+1(-1

√x²-6x+9+√x²+2X+1(-1
解√x^2-6x+9+√x^2+2X+1
=√(x-3)^2+√(x+1)^2
=/x-3/+/x+1/
=3-x+x+1
=4