Question

plzzz solve this question

Answer 1

# Solve 30/(✓20+✓5)

→ We will Rationalise the Denomiator -

30/(✓20+✓5) × (✓20-✓5)/(✓20-✓5)

= (30(✓20-✓5))/(✓20)²-(✓5)²

= (30(✓20-✓5))/20-5

= (30(✓20-✓5))/15

= 2(✓20-✓5)

= 2✓20-2✓5

= 2 (2✓5) - 2✓5

= 4✓5 - 2✓5

= 2✓5

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