December 2018 1 20 Report
Jika x1 dan x2 merpakan akar-akar persamaan 5^{x+1} + 5^{2-x} = 126 , maka x1+x2 = . . . .

A. -3
B. -1
C. 1
D. 5
E. 25 1/2

matdas
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