\(\displaystyle \dfrac{d}{dx}([f(x)][g(x)])\)

\(\displaystyle [g(x)][f'(x)] + [f(x)][g'(x)] \)

\(\displaystyle \dfrac{d}{dx}([9x^{4} + 12][13x - 5])\)

\(\displaystyle [13x - 5][36x^{3}] + [9x^{4} + 12][13] \)

\(\displaystyle \dfrac{d}{dx}([50x^{2} + 12x][13x^{5} - 4x])\) ??

\(\displaystyle [g(x)][f'(x)] + [f(x)][g'(x)] \)

\(\displaystyle \dfrac{d}{dx}([9x^{4} + 12][13x - 5])\)

\(\displaystyle [13x - 5][36x^{3}] + [9x^{4} + 12][13] \)

__Your Turn__\(\displaystyle \dfrac{d}{dx}([50x^{2} + 12x][13x^{5} - 4x])\) ??

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