Ответ:
x^2-4x+5=x^2-4x+4+1=( x-2 )^2+1
x^2+2x+6=x^2+2x+1+5=(x+1)^2+5
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Ответ:
x^2-4x+5=x^2-4x+4+1=( x-2 )^2+1
x^2+2x+6=x^2+2x+1+5=(x+1)^2+5