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kalikan kedua ruas dengan 6, sehingga didapatkan :
b.
kalikan kedua ruas dengan 4, sehingga didapatkan :
ax² + bx + c = 0
no.1...x² + (b/a)x + c/a = 0
x² - (α + β)x + α.β = 0
x² - (-1/3 + 1/2) x + (-1/3)(1/2) = 0
x² - (1/6)x - 1/6 = 0
6x² - x - 1 = 0
no.2 ....α = (1/2 + √2) Dan β = (1/2 - √2)
α + β = (1/2 + √2) + (1/2 - √2) = 1
α.β.= (1/2 + √2) (1/2 - √2) = 1/4 - 2 = - 7/4
.x² + (b/a)x + c/a = 0
x² - (α + β)x + α.β = 0
x² - (1)x + (- 7/4) = 0
x² - 1x - 7/4 = 0
4x² - 4x - 7 = 0