Solve b-1 * a-1 = (a*b)-1

If a negative sign or a subtraction symbol appears outside parentheses, remove the parentheses and change the sign of every term within the parentheses

- 1 - b + 1

Since two opposites add up to 0,remove them form the expression

- b

(- 1 - b) a = - b

Divide both sides

\frac{( - 1 - b ) a}{- 1 - b} = \frac{- b}{- 1 - b}

Divide the numbers

a = \frac{- b}{- 1 - b}

Solution

a = \frac{b}{1 + b}

Show Solution

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