Question

Selesaikan dengan melengkapkan kuadrat sempurna.
X pangkat 2 - x - 6=0

Answer 1

X² - x - 6 = 0
x² - x + 1/4 = 6 + 1/4
(x - 1/2)² = 25/4
x - 1/2 = ± 5/2
x = 1 ± 5 / 2
x = -2 atau x = 3

Answer 2

X²-x-6=0 ⇔ x²-x=6
x²-x+(1/2)² = 6+(1/2)²
(x+1/2)² = 6 1/4
x+1/2 = +-√6 1/4
x = -1/2 +-√6 1/4
x1 = -1/2 + √6 1/4
x2 = -1/2 - √6 1/4

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