Question

lowest rationalising factor of √5-3

Answer 1

Answer is √5+3

How ?

See √5−3

(√5-3)(√5+3)

According to formula (a−b)(a+b)=a²−b²

so (√5)²−(3)²

Now here , Under root 5 will be cancelled with the square outside the bracket .

and

3 will be sqaured I.e 9

5 −9

−4

This is an answer of simplification BUT

the rationalising factor is √5+3

Hope it helps you !!

Answer 2

Step-by-step explanation:

√5+3. hope it will help u