Bentuk sederhana dari 10/ 2√3 + √7 adalah....
A. 4√3 + 2√7
B. 4√3 + √7
C. 4√3 - √7
D. 4√3 - 2√7
A. 4√3 + 2√7
B. 4√3 + √7
C. 4√3 - √7
D. 4√3 - 2√7
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Jawabrasional bentuk akar
10/ (2√3 +√7)(2√3- √7) =
= 10 (2√3 - √7) / (2√3 + √7)(2√3 - √7)
= 10 (2√3 - √7) / (12 - 7)
= 10 (2√3 - √7) / (5)
= 10/5 (2√3 - √7)
= 2 (2√3 - √7)
= 4√3 - 2√7