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b. empat + tiga akar 2 per empat
4-V2 / 4+V2
= 4-V2 × 4-V2 / 4+V2 × 4-V2
= 16 - 8V2 + 4 / 16 - 4
= 20 - 8V2 / 12
= 5 - 2V2 /3
c.
2a / 3a+V5
= 2a × 3a-V5 / 9a^2 - 5
= 6a^2 - 2aV5 / 9a^2 - 5
d.
V3 / V5 - V10
= V15 + V30 / 5 - 10
= V15 + V30 / -5
e.
xy / V× + Vy
= xyVx + xvVy / x - y