I need help on these two integration questions:(adsbygoogle = window.adsbygoogle || []).push({});

1.

(x^2 -16)/(2x + 8) dx

2.

1/(1+9x^2) dx

I can't seem to find a "u" for either. And I tried a tan identity on number 2 to no avail.

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# 2 Integration questions.

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