Find the derivative.

{sqrt(x+8)}*(x^2+20x)

(x+8)^1/2(2x+20) minus (1/2)(x+8)^-1/2(x^2+20x)

I'm not feeling confident I am on the right track and I have a quiz tomorrow over this.

1 answer

not bad, but why did you subtract?

d/dx (x+8)^(1/2) = (1/2)(x+8)^(-1/2)

your derivative is good, except for that.
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