Question

help me i can't solve it

Answer 1

value of b=d 3√5/5 Answer

Answer 2

Hey mate !!

Here's your answer !!

Given:  $\frac{4 + 3 \sqrt{5} }{ \sqrt{5} } = a + b \sqrt{5}$

Let us first rationalise the denominator by multiplying by √ 5 

= ( 4 + 3√5 ) × √ 5 / √ 5 × √ 5

= 4√5 + 3 × 5 / 5 

= 4√5 + 15 / 5

=> 15 + 4√5 / 5 = a + b√5

Hence b = 4 / 5 and a = 15 / 5 

Hope it helps !!

Cheers !!