October 2018 1 19 Report
Jika  x_{1} dan  x_{2} memenuhi persamaan 9^{ x^{2}+x-1} =  \frac{ 27^{x+1} }{y9} , nilai (  4_{ x_{1} ^{2} } + 4_{ x_{2} ^{2} } ) adalah ...
Tolong bantu ya kak? plis. butuh banget kak...
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