berapa jawabannya [tex]5 \sqrt{4} + 7 \sqrt{4} + 9 \sqrt{4} = ......[/tex]

5 akar 4 + 7 akar 4 + 9 akar 4
= (5+7+9) akar 4
= 21 akar 4
= 21 × 2
= 42

Hasil dari
5√4 + 7√4 + 9√4

→ (5 x 2) + (7 x 2) + (9 x 2)
→ 2(5 + 7 + 9)
→ 2 x 21
→ 42