Don't understand this simple functions question (1 Viewer)

[hsc3hard5me]

f(x) = |x-2| - |x+4| for -2<x<2

Express the function in the form f(x) = ax + b

 

[Trebla]

f(x) = |x-2| - |x+4| for -2<x<2

Express the function in the form f(x) = ax + b

When -2 < x < 2 then |x - 2| = -(x - 2) (since x - 2 < 0) and |x + 4| = x + 4 so you can work out f(x) from there

 

[hsc3hard5me]

When -2 < x < 2 then |x - 2| = -(x - 2) (since x - 2 < 0) and |x + 4| = x + 4 so you can work out f(x) from there

Thanks I don't know how that confused me but I got it now