Identify function: Identify the function to differentiate.We are given the function y=(−5x2−3)−4. We need to find the derivative of this function with respect to x.
Apply chain rule: Apply the chain rule for differentiation.The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is u−4 and the inner function is u=−5x2−3.
Differentiate outer function: Differentiate the outer function with respect to the inner function u. The derivative of u−4 with respect to u is −4u−5.
Differentiate inner function: Differentiate the inner function u with respect to x. The derivative of u=−5x2−3 with respect to x is dxdu=−10x.
Apply chain rule: Apply the chain rule by multiplying the derivatives from Step 3 and Step 4. (dxdy)=(−4)(−5x2−3)−5×(−10x)
Simplify expression: Simplify the expression. (dxdy)=40x(−5x2−3)−5
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