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Mathematics
Problem
Find the coefficient of
x
2
x^{2}
x
2
in the polynomial
4
−
6
x
5
+
7
x
2
−
3
x
4
+
9
x
4-6x^{5}+7x^{2}-3x^{4}+9x
4
−
6
x
5
+
7
x
2
−
3
x
4
+
9
x
. a)
14
14
14
b)
7
7
7
c)
4
4
4
d)
9
9
9
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