trinahaferwickerry trinahaferwickerry

26-07-2016
Mathematics

contestada

factor the expression. x^2 – x – 42

a. (x 7)(x – 6)

b. (x – 7)(x 6)

c. (x – 7)(x – 6)

d. (x 7)(x 6)

Respuesta :

crisforp crisforp

26-07-2016

x^2 - x - 42 = x^2 - 6x + 7x - 42 = x( x - 6) + 7(x - 6) = (x-6)(x+7);
The correct answer is a.

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