hasil dari....^2=28/27

Bab Eksponensial
Matematika SMP Kelas IX

a² = 28/27
√a² = √(28/27)
a = √((4 x 7)/(9 x 3))
a = √(4/9) x √(7/3)
a = (2/3) (√7)/(√3)
a = (2/3) . (√7) . (√3)/√3²
a = (2/3) (√21) / 3
a = (2/9) √21