Question

[Michiel Girl Mít Ướt]

Find the value of x  such that  | x² + 3 + |x + 3|| = (3 - x)².
Answer x = : .
(write your answer by decimal in simplest form)

Answer 1

[Nguyễn Nhật Minh]

+x>-3 => x² +x+6 =9-6x+x² => 7x=3 => x =3/7 (TM)

+x< -3  => |x² -x| = 9 -6x +x² => x² -x =9-6x+x² => 5x = 9 => x = 9/5 loại

=> x = 3/7