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Let 
y be defined implicitly by the equation

(-8x-2y)^(3)=-x^(2)-10y^(2).
Use implicit differentiation to find 
(dy)/(dx).

Let y y be defined implicitly by the equation\newline(8x2y)3=x210y2. (-8 x-2 y)^{3}=-x^{2}-10 y^{2} . \newlineUse implicit differentiation to find dydx \frac{d y}{d x} .

Full solution

Q. Let y y be defined implicitly by the equation\newline(8x2y)3=x210y2. (-8 x-2 y)^{3}=-x^{2}-10 y^{2} . \newlineUse implicit differentiation to find dydx \frac{d y}{d x} .
  1. Differentiate with respect to xx: Differentiate both sides of the equation with respect to xx. We have the equation (8x2y)3=x210y2(-8x-2y)^{3}=-x^{2}-10y^{2}. We will apply the chain rule to the left side and the power rule to the right side. Remember that when differentiating yy with respect to xx, we treat yy as a function of xx and use the chain rule to include dydx\frac{dy}{dx}.
  2. Apply chain rule to left side: Apply the chain rule to the left side of the equation.\newlineThe derivative of (8x2y)3(-8x-2y)^{3} with respect to xx is 3(8x2y)2(82dydx)3*(-8x-2y)^{2}*(-8 - 2*\frac{dy}{dx}), where we have multiplied by the derivative of the inside function (8x2y)(-8x-2y), which is 8-8 for the xx part and 2dydx-2*\frac{dy}{dx} for the yy part because yy is a function of xx.
  3. Apply power rule to right side: Apply the power rule and chain rule to the right side of the equation.\newlineThe derivative of x2-x^{2} with respect to xx is 2x-2x, and the derivative of 10y2-10y^{2} with respect to xx is 20ydydx-20y\frac{dy}{dx}, where we have multiplied by dydx\frac{dy}{dx} because yy is a function of xx.
  4. Write down differentiated equation: Write down the differentiated equation.\newlineWe now have 3(8x2y)2(82dydx)=2x20ydydx3(-8x-2y)^{2}(-8 - 2\frac{dy}{dx}) = -2x - 20y\frac{dy}{dx}.
  5. Solve for dydx\frac{dy}{dx}: Solve for dydx\frac{dy}{dx}.\newlineTo solve for dydx\frac{dy}{dx}, we need to collect all terms containing dydx\frac{dy}{dx} on one side and the rest on the other side. We get:\newline3(8x2y)2(2dydx)20ydydx=2x3(8x2y)2(8)3(-8x-2y)^{2}(-2\frac{dy}{dx}) - 20y\frac{dy}{dx} = -2x - 3(-8x-2y)^{2}(-8).
  6. Factor out dydx\frac{dy}{dx}: Factor out dydx\frac{dy}{dx} from the left side of the equation.\newlinedydx×(3(8x2y)2(2)20y)=2x3(8x2y)2(8).\frac{dy}{dx} \times (3(-8x-2y)^{2}(-2) - 20y) = -2x - 3(-8x-2y)^{2}(-8).
  7. Isolate dydx\frac{dy}{dx}: Isolate dydx\frac{dy}{dx}.dydx=2x3(8x2y)2(8)3(8x2y)2(2)20y\frac{dy}{dx} = \frac{-2x - 3(-8x-2y)^{2}(-8)}{3(-8x-2y)^{2}(-2) - 20y}.
  8. Simplify expression for dydx\frac{dy}{dx}: Simplify the expression for dydx\frac{dy}{dx} if possible.\newlineWe can leave the expression as it is because it does not simplify easily. So, the final answer is:\newlinedydx=2x+38(8x2y)26(8x2y)220y\frac{dy}{dx} = \frac{-2x + 3 \cdot 8(-8x-2y)^{2}}{-6(-8x-2y)^{2} - 20y}.

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