Name the property of equation 8.2 + (-8.2)=0

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

2/3(-6y+9x) expand each expression using the distributive property