Question

2x^2-4x-6
selesaikan dengan cara melengkapi kuadrat!!

Answer 1

2x² - 4x - 6 = 0
x² - 2x - 3 = 0
x² - 2x = 3
x² - 2x + 1 = 3 + 1
x² - 2x + 1 = 4
(x - 1)² = 4
x - 1 = √4
x - 1 = 2
x = 1 2
x = 1 + 2 = 3
atau
x = 1 - 2 = -1