Find the (linear) equation of the tangent plane to the surface z=5y^2−2x^2+x at the point (2,−1,−1). Your answer should be in the form of an equation, e.g., something like ax+by+cz=d or a(x−x0)+b(y−y0)+c(z−z0)=0 would work. Equation:___________________

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A:

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