`x.4-(1-\sqrt{3})x.2 – \sqrt{3} = 0` `⇔ x.4 – (1-\sqrt{3})x.2=\sqrt{3}` `⇔ x.2 + 2\sqrt{3}x = \sqrt{3}` `⇔ 2(1+\sqrt{3})x=\sqrt{3}` `⇔ x=(3-\sqrt{3})/4` Vậy `S = {(3-\sqrt{3})/4}` Bình luận
`x.4-(1-\sqrt{3})x.2 – \sqrt{3} = 0`
`⇔ x.4 – (1-\sqrt{3})x.2=\sqrt{3}`
`⇔ x.2 + 2\sqrt{3}x = \sqrt{3}`
`⇔ 2(1+\sqrt{3})x=\sqrt{3}`
`⇔ x=(3-\sqrt{3})/4`
Vậy `S = {(3-\sqrt{3})/4}`