Step-by-step explanation
Absolute value basically measures how far the number is from zero,for example
as we can see
hence,
Step 1
so, we need to find a number such the distance from zero to that number be zero,
therefore , that number is zero
hence
Step 2
now, weed to find a value such distance from zero is 2, so those values are +2 and -2
Step 3
c)
the solution of a absolute value function is always positive, remeber we are talking about a distance, so, there is not solutioni
I hope this helps you