February 2019 1 20 Report
Suatu persamaan kuadrat memiliki akar x_{1}  dan x_{2} ,maka nilai x_{1}^2 + x_{2}^2 =
A. ( x_{1}+ x_{2} )^{2} + 2 x_{1} x_{2}
B. ( x_{1}+ x_{2} )^{2} - 2 x_{1} x_{2}
C. ( x_{1}- x_{2} )^{2} + 2 x_{1} x_{2}
D. ( x_{1}- x_{2} )^{2} - 2 x_{1} x_{2}

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