Question

Pliss bantuin sama caranya yaa, no 5,6,7 thanks

Answer 1

5. 729^2/3 = (3^6)^2/3 = 3^6x2/3 = 3^4 = 81

6. 5√28 + 4√7 - 3√63
= 5 √(4x7) + 4 √7 - 3 √(9x7)
= 5x2√7 + 4√7 - 3x3√7
= 10√7 + 4√7 - 9√7
= 5√7

7. 20/√5 = 20/√5 x √5/√5
= 20√5 / √5x√5
= 20√5 / 5
= 4√5