Question

prove that √7+√8 is irrational​

Answer 1

√7-8 is an irrational.

Explanation:

Let consider,√7-8 is rational number

√7-8=a÷b.

√7=a÷b+8

then take lcm b

then the equation is a+8b up on b

a+8b up on b is rational the √7 is also rational.

But √7 is irrational.

So, our supposition or assumption is wrong.

√7-8 is an irrational number.