Question

\(\sqrt{ab}-\sqrt{a}-\sqrt{b}+1\)

Answer 1

\(đka\ge0,b\ge0\\ =\sqrt{a}\left(\sqrt{b}-1\right)-\left(\sqrt{b}-1\right)\\ =\left(\sqrt{a}-1\right)\left(\sqrt{b}-1\right)\)

Answer 2

`ĐK : a >= 0 ; b>=0`

`sqrt{ab} -sqrt{a} -sqrt{b} +1`

`= sqrt{a} ( sqrt{b} -1) - (sqrt{b} -1}`

`= ( sqrt{a} - 1 ) (sqrt{b} - 1)`