Why does the domain of the function f(x)=x^2-2have to be restricted in order create an inverse function? What is the domain of the inverse of f(x)?

Put the equation in slope intercept form by solving for y

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.