Find : $ dy/dx, y=\sqrt{4x^2 - 7x - 2}$ The problem says Find $dy/dx,  y=\sqrt{4x^2 - 7x - 2}$
So far I changed it to $(4x^2 - 7x - 2)^{1/2}$
I don't know where to go from there.

$$
y = u^{1/2},\qquad u = 4x^2-7x-2,\qquad \frac{dy}{dx} = \frac{dy}{du}\cdot\frac{du}{dx}.
$$
