- #1
madah12
- 326
- 1
Homework Statement
find the inverse of
y=2x^2-8x
x>=2
I am in calculus b but forgot some of the algebra so I am not sure how to treat the root
Homework Equations
The Attempt at a Solution
I am skipping steps
y=2(x-2)^2-8
(y+8)/2=(x-2)^2
I know that x >=2
so f(2) =-8 and it is increasing so the range is [-8,infinity)
now how can I know which root to take?