Question

find the zero of pol. X^2 + 2x + 1

Answer 1

Answer:

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Answer 2

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$x {}^{2} + 2x + 1 = 0 \\ x {}^{2} + (x + x) + 1 = 0 \\ x {}^{2} + x + x + 1 = 0 \\ x(x + 1) + 1( x + 1) = 0 \\ (x + 1)(x + 1) = 0 \\ x = - 1 \: and \: - 1$

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