no 3-4 gimana caranya ya?bantu jawab dong

3. 2³ x 27² : 2-³ x 81 = 2³ x (3³)² : 1/2³ x 3⁴
= 2³ x 3'6 : 1/2³ x 3⁴
= 3² = 9
4.√486 - √6 + √54 = √81x6 - √6 + √ 9x6
=9√6 - √6 + 3√6
= 9√6 - 4√6=5√6