what is the range of all the roots of | x ^ 2 - 4 | = x ?
"we get 2 quadratic equations here . . 1 ) x ^ 2 - x - 4 = 0 . . . . . . . roots 2 , - 1 2 ) x ^ 2 + x - 4 = 0 . . . . . . . . roots - 2 , 1 inserting each root in given equation , it can be seen that - 1 and - 2 do not satisfy the equations . so value of x for given equation . . . . x = 4 or x = 1 i guess range is 4 - 1 = 3 b"
sqrt(4)