- #1
staples82
- 17
- 0
Homework Statement
Assume x and y are functions of t. Evaluate dy/dt for each of the following.
xy-5x+2y^3=-70, dx/dt=-5 x=2 y=-3
Homework Equations
n/a
The Attempt at a Solution
I used x' and y' for dx/dt and dy/dt
I found the derivative of the equation, using the product rule for xy
(x)(yy')+(y)(xx')-5+6y^2=0
From here, my problem was figuring out how to simplify the equation...
(x)(yy')=5-6y^2-yxx'
y'=
The answer was -5/7...I'm pretty sure I messed up on solving the equation for 0 and y'