Question

Question no 10 plzzz fast

Answer 1

Answer:Let 3-3√7 be a rational number where and b are integers having no common factor and b is not equal to 0

Step-by-step explanation:3-3√7=a/b

3√7=a/b -3

3-√7=a-3b by B

√7=a-3b by 2b

Since a n b are integers

Therefore a-3b by 2b is rational

Answer 2

Step-by-step explanation:

we know that √7 is an irrational no.

let 3-3√7 = a/b ( where a and b are the integers)

now

3-a/b= 3√7

(3b-a)

_____ = √7

b

as a and b are integers so (3b-a)/b should be a rational no. and so √7 should also be a rational no. .but this will contradict the fact that √7 is an no. this contradiction has occur becoz of our wrong assumption

so we conclude that 3-3√7 is an irrational no.