simplify: 2 minus root 5
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Answered by
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Answer:
2-root 5
Is it incomplete
Step-by-step explanation:
plz................. send complete question
Answered by
0
Step-by-step explanation:
Let us assume on the contrary that 1/2-√5 is a rational no.
Then there exist two co-prime integers a and b such that --
1/2-√5 =a/b
-√5=a/b-1/2
(Now taking minus a as common)
√5=1/2-a/b
√5=b-2a/2b
( a,b are integers therefore b-2a/2 is rational)
As we know √5 is rational. So this contradicts the fact that √5 is irrational. And our assumption gets wrong,
Hence, 1/2-√5 is an irrational.
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