Answer:1.4
Step-by-step explanation:
soolve the equation from left to right then square root it
If its even the f(x) = f(-x)
f(-x) = -x ((-x)^3 + x) = x^4 - x^2
f(x) = x^4 - x^2
So the function is even
Negative dividing by negative gives positive,
so 18:9=2
1:4 is equal to 2:8, it's a simplified version.
