Question

(1+ . 5-√5/1-√5) (5+√5\1+√5. +1) 1/√3-√2+1/√3+√2 Giúp mik vs cảm ơn

Answer 1

a: \(=\left(1+\dfrac{\sqrt{5}\left(\sqrt{5}-1\right)}{-\left(\sqrt{5}-1\right)}\right)\left(\sqrt{5}+1\right)\)

=(1-căn 5)(1+căn 5)

=1-5=-4

b: \(=\sqrt{3}+\sqrt{2}+\sqrt{3}-\sqrt{2}=2\sqrt{3}\)