Question

Which of the following is not irrational?

1 point

(1+√5)

(1-√5)

(1+√5) (1-√5)

√5

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Answer 1

Answer:

$(1 + \sqrt{5} )(1 - \sqrt{5} )$

Step-by-step explanation:

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Answer 2

Answer:

$(1 + \sqrt{5} )(1 - \sqrt{5} )$

Step-by-step explanation:

$(1) {}^{2} - ( { \sqrt{5} })^{2} \: \: \: (a {}^{2} - b {}^{2} )\\ = 1 - 5 = - 4$

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