factorization of x²-4x +5
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x2 - 4x - 5 = 0 x2 - 4x = 5 Add 5 to each side. x2 - 4x + 4 = 5 + 4 Complete the square by adding 4 to each side. (x - 2)2 = 9 Factor the perfect square trinomial. x - 2 = 3 Take the square root of each side.
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