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(√4 × √2) + (√25 × √3) - { (√16 × √2) + (√81 × √3)}
(2 × √2) + (5 × √3) - { (4 × √2) + (9 × √3)}
2√2 + 5√3 - (4√2 + 9√3)
2√2 + 5√3 - 4√2 - 9√3
(2√2 - 4√2) + (5√3 - 9√3)
- 2√2 + (- 4√3)
- 2√2 - 4√3
Jawaban-Nya yang B. - 2√2 - 4√3