Which of the following is one of the factors of x2 - 8x +15?

Answer 1

x² - 8x + 15 =

x² - 5x - 3 x + 15 =

x ∙ x - 5 ∙ x - 3 ∙ x + 15 =

x ∙ x - 5 ∙ x - 3 ∙ x - 3 ∙ ( - 5 ) =

x ( x - 5 ) - 3 ( x - 5 ) =

( x - 5 ) ( x - 3 )