Question

prove that 2 root 5 is an irrational number​

Answer 1

ANSWER

If possible, let us assume 2+5 is a rational number.

2+5=qp where p,q∈z,q=0

2−qp=−5

q2p−p=−5

⇒−5 is a rational number

∵q2q−p is a rational number

But −5 is not a rational number.

∴ Our supposition 2+5 is a rational number is wrong.

⇒2+5 is an irrational number.

Answer 2

Answer:

yes irrational

Step-by-step explanation:

since root 5 is irrational number and 2 multiply with root 5

so,also 2 root 5 is a irrational number