Math, asked by jyotisinghi09123, 6 hours ago

If a=5-2√5,then find a2

Answers

Answered by yashugoyal00

4

Step-by-step explanation:

a= 5- 2√5

a² = (5- 2√5)²

use identity (a-b)² = a²+b²-2ab

25+ 20 - 20√5

45-20√5

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