If \( f\left(x^{2}-6 x+6\right)+f\left(x^{2}-4 x+4\right)=2 x \forall x \in R \) then \( f(-3)+ ...
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If \( f\left(x^{2}-6 x+6\right)+f\left(x^{2}-4 x+4\right)=2 x \forall x \in R \) then \( f(-3)+ \) \( f(9)-5 f(1)= \)
(A) 7
(B) 8
(C) 9
(D) 10
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