Question

if x=√5+2 find the value of x^2÷1/x^2
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Answer 1

Answer:

1.0495

Step-by-step explanation:

x=√5+2 find the value of x^2÷1/x^2

x^2 = (√5+2)^2 = 4 +5 +4√5 = 9+4√5

1/x^2 = 1/ √5+2 =  4 +5 -4√5 = 9-4√5

now , x^2÷1/x^2 = 9+4√5 / 9-4√5 = 1.0495