# Math: Calc

posted by
**Katie** on
.

y= 3x^2+3x+2

Find the diferential dy when x=4 and dx = 0.4 and when dx = 0.8.

How do I find these diferentials?

y= 3x^2+3x+2

dy= 6x dx + 3dx

Now put in the values, and compute.