Question

Find the square of √5 -2 ​

Answer 1

9-4√5

Step-by-step explanation:

(√5-2)^2

=(√5)^2+(2)^2-2(√5)(2)

=9-4√5

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Answer 2

(√5 - 2)²

(a - b)² = a² + b² - 2ab

(√5)² + (2)² - 2(√5)(2)

5 + 4 - 4√5

9 - 4√5

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