Question

If x=2+√5,prove that x^2+1=18
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Answer 1

Answer:

(2+_/5)²+1=18

4+5+1=18

10=18

10 is not equal to 18 so hence it is not proved

Step-by-step explanation:

Answer 2

Answer:

Not proved

Step-by-step explanation:

(2

$(2 + \sqrt{5} ) + 1 = 18 \\ 4 + 5 + 1 = 18 \\ 10 = 18 \\ 10 \: is \: not \: equal \: to \: 18 \\ hence \: not \: proved \:$

Hope it's helpful