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Homework Statement
Find the arclength of the parametrized path x(t) = (t^2)/2 , y(t) = (t^3)/3 for 1<t<3.
Homework Equations
Arc Length Formula
The Attempt at a Solution
x'=t and y'=t^2.
Putting them into the arc length formula, I get sqrt(t^2 + t^4) inside.
I'm confused about how to simplify this part. The answer (10sqrt(10)-2sqrt(2))/3 suggests the quadratic formula somewhere along the way. I could probably pull out a variable into sqrt(t^2(t^2 + 1)) or tsqrt(t^2+1) but how do I use the quadratic equation in this case?