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Mathematics
Problem
Find the integral of
1
x
2
+
a
2
\frac{1}{x^2 + a^2}
x
2
+
a
2
1
w.r.t
x
x
x
and hence find
∫
1
3
+
2
x
+
x
2
d
x
\int \frac{1}{3+2x+x^2} dx
∫
3
+
2
x
+
x
2
1
d
x
. (M-16, M-20)
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