Question

How to solve this 2 question​

Answer 1

Answer:

Answer

15.given. 30

5√3-3√5

we can write as 30 × 5√3+3√5

5√3-3√5. 5√3+3√5

Denominator are form (a-b) (a+b)

a square - b square

= 30×5√3+3√5

(5√3) square - (3√5) square

therefore, 30×8√15

(5)sq (√3)sq - (3)sq (√5)sq

30×8√15

25×3-9×5

30×8√15

75-45

30×8√15

30

answer is 8√15

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