How do you factor the trinomial $x² - 4x + 4$ ?

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Answer 1 · 2015-11-20T08:48:59

Decide which factors of 4 (the last element) add to make 4 (the middle element) then factorise

$x^2 -4x +4 = (x-2)(x-2)$

How do you factor the trinomial x² - 4x + 4x² - 4x + 4?