x^2+2x+1 find other zeroes
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x^2+2x+1
x^2+x+x+1
x(x+1)+1(x+1)
(x+1)(x+1)
x=1,x=1
x^2+x+x+1
x(x+1)+1(x+1)
(x+1)(x+1)
x=1,x=1
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