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The derivative of a sum of two or more functions is the sum of the derivatives of each function
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$\frac{d}{dx}\left(\left(x-3\right)\left(x-4\right)\right)+\frac{d}{dx}\left(\left(x-3\right)\left(x+4\right)\right)$
Learn how to solve differential calculus problems step by step online. Find the derivative of (x-3)(x-4)+(x-3)(x+4). The derivative of a sum of two or more functions is the sum of the derivatives of each function. Apply the product rule for differentiation: (f\cdot g)'=f'\cdot g+f\cdot g'. The derivative of a sum of two or more functions is the sum of the derivatives of each function. The derivative of a sum of two or more functions is the sum of the derivatives of each function.