Prove thar 3+ under root 5 is irrational by brainly
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let us assume 3+√5 be rational number
let us also assume that a and b be coprime positive integer where (b does not equal to 0)
3+√5 =a/b
√5= a/b -3
√5= a -3/b/b
√5= a/b-3
so a, b and 3 is rational numbers so is the √5 but it's a contradict fact that √5 is irrational number so 3+√5 tend to be irrational number.
let us also assume that a and b be coprime positive integer where (b does not equal to 0)
3+√5 =a/b
√5= a/b -3
√5= a -3/b/b
√5= a/b-3
so a, b and 3 is rational numbers so is the √5 but it's a contradict fact that √5 is irrational number so 3+√5 tend to be irrational number.
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