annie1799 annie1799

19-10-2019
Mathematics

contestada

factor the following
(y-1)^2-4

Respuesta :

jimrgrant1 jimrgrant1

19-10-2019

Answer:

(y - 3)(y + 1)

Step-by-step explanation:

Given

(y - 1)² - 4 ← this is a difference of squares and factors in general as

a² - b² = (a - b)(a + b), thus

(y - 1)² - 4

= (y - 1)² - 2²

= (y - 1 - 2)(y - 1 + 2)

= (y - 3)(y + 1) ← in factored form

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