Question

Rationalise the denomiator - 1 upon 2 root 5

Answer 1

Rationalising factor=2✓5

Therefore -2 multiply by 2✓5 and 2✓5 multiply by 2✓5

2(2✓5)=4*2✓5

2✓5*2✓5=4*5=20

THEREFORE ANSWER IS 8✓5/20

HOPE IT HELPS YOU

Answer 2

See the photo attached for solution