Question

Which equation has 1 solution? IwI = -2 IwI = -1 IwI = 0 IwI = - 1

Answer 1

Absolute value is alwas positive
so all of them excet the 3rd one are false

|w|=0 has 1 solution


if the last one was |w|=1 then ther would be 2 solutions, -1 and 1


answer is |w|=0