Ответ:
x^2-9=x^2+2x+1
-2x=10
x=-5
X^2-9=x^2+2x+1
-9=2x+1
-9-2x-1=0
-10-2x=0
5+x=0
X= -5
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Ответ:
x^2-9=x^2+2x+1
-2x=10
x=-5
X^2-9=x^2+2x+1
-9=2x+1
-9-2x-1=0
-10-2x=0
5+x=0
X= -5