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Multiply $4$ times $2$
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$derivdef\left(a^2-6a+8a\right)$
Learn how to solve definition of derivative problems step by step online. Find the derivative of a^2-6a4*2a using the definition. Multiply 4 times 2. Combining like terms -6a and 8a. Find the derivative of a^2+2a using the definition. Apply the definition of the derivative: \displaystyle f'(x)=\lim_{h\to0}\frac{f(x+h)-f(x)}{h}. The function f(x) is the function we want to differentiate, which is a^2+2a. Substituting f(x+h) and f(x) on the limit, we get. Expand \left(a+h\right)^2.