September 2018 1 72 Report
X1 dan X2 adalah akar-akar persamaan x²-2x+4=0.Hitunglah:
a. \frac{1}{ x_{1} } +  \frac{1}{ x_{2} }
b. x_{1^{2} +  x_{2^{2}
c.( x_{1}- x_{2} ) ^{2}
d.  \frac{x _{2} }{x _{1} } + \frac{x _{1} }{ x_{2} }

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