Jawapan:
Penjelasan:
Mula dengan membiarkan
Ia mengikutinya
dan juga
Ini bermakna kita sedang mencari
Ingat bahawa:
Sekarang, gunakan identiti
Seterusnya, gantilah
Apakah bentuk paling mudah ungkapan radikal (sqrt2 + sqrt5) / (sqrt2-sqrt5)?
(2) + sqrt (5)] ^ 2 / (2-5) = - 1/3 [2 + 2sqrt (10) +5] = -1 / 3 [7 + 2sqrt (10)]
Bagaimana anda mempermudah (sqrt5) / (sqrt5-sqrt3)?
(5 + sqrt (15)) / 2 => sqrt (5) / (sqrt (5) - sqrt (3)) Multiply and divide by (sqrt (5) (sqrt (5) - sqrt (3)) × (sqrt (5) + sqrt (3)) / (sqrt (5) + sqrt (3) =) (Sqrt (5) (sqrt (5) + sqrt (3))) (/ ((sqrt (5) - sqrt (3) (2) (2) (2) (2) (2) (a) (5) sqrt (5) + sqrt (5) sqrt (3)) / (5 - 3) => (5 + sqrt (15)
Bagaimana anda mempermudah (sqrt5 + 3) / (4-sqrt5)?
[4 + sqrt5] / [4 + sqrt5] = [4sqrt5] + 12 [sqrt5 + 3] / [4 - sqrt5] = [sqrt5 + 3] 5 + 3sqrt5] / [16 - 5] = [17 + 7sqrt5] / 11 = 17/11 + [7sqrt5] / 11