Question

A) x(x+1)=x+2 calculati

Answer 1

$x^{2} +x=x+2; x^{2} =2 ; x=+- \sqrt{2}$

Answer 2

x² +x -x = 2 
x² -2 =0 
x² - (√2)² =0
( x - √2 )·( x + √2) =0 
cu solutii 
x-√2 =0          ; x=√2
x+√2=0          ; x=-√2