5x²-27=18 penyelesaian dgn cara pemfaktoran

5x²-27=18
5x² = 18 + 27
5x² = 45
x² = 9
x = ±3

[tex]5 {x}^{2} - 27 = 18 \\ 5x {}^{2} - 27 - 18 = 0 \\ 5 {x}^{2} - 45 = 0 \\ semua \: dibagi \: 5 \\ {x}^{2} - 9 = 0 \\ x(x - 9) = 0 \\ x = 0 \\ x = 9[/tex]