What is (2-sqrt(5))(2-sqrt(5)) ?

The solution to (2-sqrt(5))(2-sqrt(5)) is 9-4sqrt(5)

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simplify (2-sqrt(5))(2-sqrt(5))

simplify

(2 - 5) (2 - 5)

9 - 45

Decimal Notation

0.05572 \dots

Solution steps

(2 - 5) (2 - 5)

Apply exponent rule:

aa = a^{2}

(2 - 5) (2 - 5) = (2 - 5)^{2}

= (2 - 5)^{2}

Apply Perfect Square Formula:

(a - b)^{2} = a^{2} - 2 ab + b^{2}

(2 - 5)^{2} = 2^{2} - 2 \cdot 25 + (5)^{2}

= 2^{2} - 2 \cdot 25 + (5)^{2}

2^{2} - 2 \cdot 25 + (5)^{2} = 9 - 45

= 9 - 45

275 e^{- 0.65}

100

e^{5 y} \cdot e^{5 y}

e^{- l n (9)}

4 e^{- 3}

What is (2-sqrt(5))(2-sqrt(5)) ?
The solution to (2-sqrt(5))(2-sqrt(5)) is 9-4sqrt(5)