Sederhanakanlah 1- 1/b^2 x 2y^7 x b^3 x y^-3 2-3m^3 x (2mn)^4 3-(tn^3)^4 x 4t^2 4- akar kuadrat dari 4 21/25

1/b^2 × 2y^7 × b^3 × y^-3
= b^(3-2) × 2y^(7+(-3))
= 2by^4

3m^3 × (2mn)^4
= 3m^3 × 2^4 × m^4 × n^4
= 48m^7 . n^4

(tn^3)^4 × 4t^2
= 4t^(4+2) × n^12
= 4t^6 . n^12

√(4 21/25)
= √(4 + 21/25)
= √((100 + 21)/25)
= √(121/25)
= 11/5
= 2 1/5