Question

fatorar: ab - a - b + 1

Answer 1

1. Agrupe:

(ab - a) + (-b + 1)

2. Fatore o MDC:

a (b - 1) - (b - 1)

3. Fatore o polinômio fatorando o mdc, b - 1:

(b - 1) (a - 1)

Resumindo:

(ab - a) + (-b + 1)

a (b - 1) - (b - 1)

(b - 1) (a - 1)

Answer 2

$ab-a-b+1\\ ab-b-a+1\\ b(a-1).-1(a-1)\\ (a-1)(b-1)$