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Verified answer
Kelas 10 MatematikaBab Persamaan Kuadrat
4x - 1 = a
4x = a + 1
x = (a + 1)/4
2x² - 3x + 8 = 0
2 ((a + 1)/4)² - 3 (a + 1)/4 + 8 = 0
2 (a² + 2a + 1)/4 - (3a + 3)/4 + 8 = 0
** dikali 4 **
2a² + 4a + 2 - 3a - 3 + 8 = 0
2a² + a + 7 = 0
2x² + x + 7 = 0