Question

prove that 3√3-5√7 is it irr​

Answer 1

Answer:

Step-by-step explanation:

Step-by-step explanation:

3√3-5/7

=consider it as rational

3√3-5/7=a/b

3√3=a/b+5/7

3√3=a7+b5/b7

this is a contradiction to our assumption

thus this is natural  a rational no.

Answer 2

we know that √3 and √7 irrational

let us consider this 3√3-5√7 as rational

3√3-5√7+5√7 is rational

3√3 is rational

$\frac{3 \sqrt{3} }{3} is \: rational$

therefore our assumption is wrong √3 is irrational

theefore ,hence proved that

3√3-5√7 is irrational

i hope this will surely help u dear .....