Question

factorise x2 - 4x + 1

Answer 1

Your question is wrong. It should be x^2-2x+1

${x}^{2} - 2x + 1$

$(x)^{2} - 2(x)(1) + (1) ^{2}$

$(x - 1) ^{2}$

Using identity (a-b)^2 =a^2-2ab+b^2

$(x - 1)(x - 1)$

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