Differentiate 5x^2 + 11x + 5 with respect to x

The simple rule of thumb applied to differentiation can be used in this example - 'Multiply each term by its power then reduce the power by one'. Doing this 5x^2 becomes 25x^(2-1)=10x. Repeating for 11x gives 111x^(1-1)=11x^0=11x as anything to the power of 0 = 1. Finally 5 disappears when differentiated with respect to x as it is not a function of x. Ie. it has no x terms in it.

Answered by Sam L. Maths tutor

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