The function of displacement y versus time x is written as y=x^2+2x-8, find the minimum displacement.

Question

The category is under quadratics if thats any help! Please help!

Answer 1

The minimum displacement is at the vertex of the y-vs.-x parabola, which is at 

 

x = -2/[2(1)] = ?

 

Evaluate y at this value of x to get y_min.