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8 June, 10:32

Factor the expression. d2 - 4d + 4

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Answers (2)
  1. 8 June, 12:07
    0
    Rewrite it in the form a^2 - 2ab + b^2, where a = d and b = 2

    d^2 - 2 (d) (2) + 2^2

    Use the Square of Difference: (a - b) ^2 = a^2 - 2ab + b^2

    (d - 2) ^2
  2. 8 June, 13:21
    0
    (d - 2) ²

    Step-by-step explanation:

    d² - 4d + 4 ← is a perfect square of the form

    (x ± a) ² = x² ± 2ax + a²

    compare coefficients of like terms

    - 2a = - 4 ⇒ a = 2 and a² = 4, hence

    d² - 4d + 4 = (d - 2) ²
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