Question

rationalise under root 7 + under root 5 / underroot 7 - under root 3​.

Answer 1

Answer:

6 + √35

Step-by-step explanation:

√7 + √5 / √7 -√5

= (√7 + √5 / √7 -√5 ) x (√7 + √5 / √7 + √5)

= (√7 + √5)^2 / √7^2 - √5^2

= 7 + 5 + 2√35 / 7 -5

= 12 + 2√35 / 2

= 2(6 + √35) / 2

= 6 + √35

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