According to the identity (a b)2 = a2+b2 2ab so (√5 2)2 = (√5)2 + (2)2 2(√5)(2) = 5 + 4 4√5 = 9 4√5 ...

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Factor of Polynomials

Simplify √5-2...

Question

_{Simplify (√5-2)^2}

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Solution

According to the identity (a-b)²= a²+b²-2ab

so (√5-2)²= (√5)²+(2)² - 2(√5)(2)
= 5 + 4 - 4√5
= 9-4√5

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