Question

√5+√7 is rational or irrational​

Answer 1

Answer:

irrational

it's irrational

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Answer 2

Answer:

irrational

Explanation:

let  us assume √5+√7 is a rational number

we known that every rational number is in the form of a/b where a and b are co-prime and b not equal to 0.

so,

√5 +√7=a/b is a rational number

√5=a/b-√7          

√5 =a-√7b/b          

but we known that √5 is a irrational number which cannot be equal to a rational no. i.e a-√7b/b

so our assumption is wrong

therefore √5 + √7 is also  an irrational number

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