February 2019 1 74 Report
Diketahui: x1 dan x2 penyelesaian dari x2 -3x + r = 0 dan x3 dan x4 penyelesaian dari x2 - 5x + 4 + r = 0. Jika x13 + x23 = x3 + x4 + 4, maka nilai r adalah..
A. -2 B. 0 C. 2 D. 4 E. 6

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