2√80-2√5. √8+√5 —————— x. ————— =? √8-√5. √8-√5
Matematika
RafliPb
Pertanyaan
2√80-2√5. √8+√5
—————— x. ————— =?
√8-√5. √8-√5
—————— x. ————— =?
√8-√5. √8-√5
1 Jawaban
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1. Jawaban denymary2013
Jawab:
Gunakan cara skema :
2.akar80 = 2.4.akar5.
akar8 = 2.akar2. Jadi
(8.akar5 - 2.akar5) x (2.akar2 + akar5) 6.akar5.(2.akar2 + akar5)
------------------------------------------------------ = -------------------------------------
(2.akar2 - akar5) x (2.akar2 - akar5) 8 - 2.akar40 + 5
12.akar10 + 30 13 + 2.akar10 156.akar10 + 240 + 390 + 60.akar10
--------------------- x -------------------- = -----------------------------------------------------
13 - 2.akar10 13 + 2.akar10 169 - 40
630 + 216.akar10
-------------------------
129