Question

Rationalizeaza fractia 4/radial din 5-1

Answer 1

4/(√5 - 1) = 

= 4(√5 + 1)/(√5 + 1)(√5 - 1)

= 4(√5 + 1)/(5 - 1)

= 4(√5 + 1)/4

= √5 + 1

Answer 2

$\frac{4}{ \sqrt{5 \: - 1} } = \frac{4 \sqrt{5} }{5 \: - 1} = \frac{4 \sqrt{5} }{4} = \sqrt{5}$+1