Evaluate ∫x2+a2 dx\int \sqrt{x^2+a^2} \, dx∫x2+a2dx.
x2x2+a2+a22ln∣x+x2+a2∣+C\frac{x}{2} \sqrt{x^2+a^2} + \frac{a^2}{2} \ln|x + \sqrt{x^2+a^2}| + C2xx2+a2+2a2ln∣x+x2+a2∣+C
x2x2+a2−a22ln∣x+x2+a2∣+C\frac{x}{2} \sqrt{x^2+a^2} - \frac{a^2}{2} \ln|x + \sqrt{x^2+a^2}| + C2xx2+a2−2a2ln∣x+x2+a2∣+C
12x2+a2+a2ln∣x+x2+a2∣+C\frac{1}{2} \sqrt{x^2+a^2} + a^2 \ln|x + \sqrt{x^2+a^2}| + C21x2+a2+a2ln∣x+x2+a2∣+C
x2x2+a2+ln∣x2+a2∣+C\frac{x}{2} \sqrt{x^2+a^2} + \ln|x^2+a^2| + C2xx2+a2+ln∣x2+a2∣+C