Question

prove that 2√3 -7 an irrational​

Answer 1

Let 2+√3 be a rational number. ... This contradicts the fact that rational≠ irrational. So, our supposition is incorrect. Hence, 2+√3 is an irrational number

Answer 2

Answer:

Assume that 2√3-7 is rational(r)

2√3-7=r

2√3=r+7

√3=r+7/2

Irr is not equal to rational

2√3-7 is irrational