Question

Rationalise the denominator of 3/√7 - 3​

Answer 1

Step-by-step explanation:

3/(sqrt 7 -3)

multiply and divide (sqrt 7 +3)

3 ×( sqrt 7 +3) 3 sqrt7 +9

_______________ = __________

(sqrt 7 -3)(sqrt 7 +3) (sqrt 7)² -3²

(a+b)(a-b) = a²-b²

= 3sqrt7 +9 / (7 -9) =( -1/2) *(3sqrt7 +9)