Math, asked by kendrapramukhpipri, 11 months ago

show that (2 + √5)² is an irrational number​

Answers

Answered by rishisairishi1616
2

Answer:

assume that 2+√5 is a irrational number

Step-by-step explanation:

(2+√5)=p/q

s.o.b.s

4+5+2(2√5)=p^\q^

2(2√5)=p^ q^-9

LHs is not equal to rhs

Answered by shruti5664
2

Step-by-step explanation:

(2+√5)^2

property:(a+√b)=a^2+b+2a√b

2^2+5+2×2×√5

4+5+4√5

9+4√5

hence,9+4√5 is an irrational numbers

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