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August 27, 2016
Posted by **Branden** on Tuesday, August 23, 2011 at 12:58pm.

- calculus -
**Reiny**, Tuesday, August 23, 2011 at 1:00pmI think you meant to type

y = 5x^2 - 2x

if so, then

dy/dx = 10x - 2

and if x = 15

dy/dx = 10(15) - 2 = 148