Question

X - √x - 2

Answer 1

= x- 2.căn (x) + căn(x) - 2

= [căn(x)-2] . [căn(x)+1]

Answer 2

x-\(\sqrt{x}\)-2= x-\(\sqrt{x}\)+1/4-9/4=(\(\sqrt{x}\)-1/2)²-(3/2)²

                                                =(\(\sqrt{x}\)-1/2-3/2)(\(\sqrt{x}\)-1/2+3/2)=(\(\sqrt{x}\)-2)(\(\sqrt{x}\)+1)