Question

Rationalise the denominator of 1?2+root5

Answer 1

multiply by conjugate 2-root5.

2-root5 / 4 - 5

= 2-root5 / -1
= -2 +root5,

Answer 2

Answer:

-2+root 5

Step-by-step explanation:

1/ 2 + root 5 * 2- root 5/2-root5

= 2-root5/ 4-5 = 2-root5/-1

= -2+root 5

Hope this helps

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