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Mathematics
Mathematics
Problem
Given that real numbers
a
,
b
a, b
a
,
b
satisfy
a
3
−
6
a
2
+
15
a
−
21
=
0
a^3 - 6a^2 + 15a - 21 = 0
a
3
−
6
a
2
+
15
a
−
21
=
0
and
b
3
−
6
b
2
+
15
b
−
7
=
0
b^3 - 6b^2 + 15b - 7 = 0
b
3
−
6
b
2
+
15
b
−
7
=
0
, respectively, then find the value of
a
+
b
a+b
a
+
b
.
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