Bantu Dongs :)..........

jawabannya (a) 8

maaf kalau salah ya

√((a + b) ± 2√ab) = √a + √b
√(10 ± 4√6) = √(10 ± 2 . 2√6)
= √(10 ± 2√24)
= √((6 + 4) ± √(6.4))
= √6 ± √4
= √6 ± 2

√((10 + 4√6)/(10 - 4√6))
= √(10 + 4√6) / √(10 - 4√6)
= (√6 + 2) / (√6 - 2)
= (√6 + 2)/(√6 - 2) . (√6 + 2)/(√6 + 2)
= (6 + 4√6 + 4)/(6 - 4)
= (10 + 4√6) / 2
= 5 + 2√6
a = 5, b = 2
a + b = 5 + 2 = 7