Question

Ques. 5 Is the number (5-√7) (5 + √7) rational or irrational?​

Answer 1

Answer:

rational number because after solution we get 18 which is a rational number

Answer 2

Step-by-step explanation:

let us assume that (5-√7)as an irrational

(5-√7)=a/b

-√7=a-5b/b

so,a,b,5are integers .so,a-5b/b as rational

then √7is rational