Question

Решите уравнение:
|x²-x-1|=1

Answer 1

$\displaystyle \left[\begin{array}{ccc}x^2-x-1=1\\x^2-x-1=-1\\\end{array}\right\\\\ \left[\begin{array}{ccc}x^2-x-2=0\\x^2-x=0\\\end{array}\right\\\\ \left[\begin{array}{ccc}\\x=2; x=-1\\x=0;x=1\\\end{array}\right$