Question

x + căn x - 12

Answer 1

\(x+\sqrt{x}-12\)

\(=x+4\sqrt{x}-3\sqrt{x}-12\)

\(=\sqrt{x}\left(\sqrt{x}+4\right)-3\left(\sqrt{x}+4\right)\)

\(=\left(\sqrt{x}-3\right)\left(\sqrt{x}+4\right)\)

Answer 2

\(x+\sqrt{x}-12=x+4\sqrt{x}-3\sqrt{x}-12\\ =\sqrt{x}\left(\sqrt{x}+4\right)-3\left(\sqrt{x}+4\right)\\ =\left(\sqrt{x}-3\right)\left(\sqrt{x}+4\right)\)