April 2019 1 15 Report
Diketahui x^2 = 6x + 5y + 7 dan y^2 = 5x + 6y + 7. Jika x dan y merupakan bilangan real dan x ≠ y, maka nilai dari xy = ...
A. -12
B. -4
C. -3
D. 3
E. 12
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