Melengkapi Kuadrat Sempurna. tolong jangan asal² an
x² + 7x² +6
x² + 7x² +6
x² + 7x + 6 = 0
x² + 7x = -6
x² + 7x + (7/2)² = -6 + (7/2)²
(x + 7/2)² = -24/4 + 49/4
(x + 7/2)² = 25/4
x + 7/2 = ± √(25/4)
x + 7/2 = ± 5/2
x + 7/2 = - 5/2 atau x + 7/2 = 5/2
x = -5/2 - 7/2 x = 5/2 - 7/2
x = -12/2 x = -2/2
x = -6 x = -1