Question

Simplify 2 root 2 by root 7 + root 5

Answer 1

Answer:

root35-root21

Step-by-step explanation:

2root7/root5+root3

(multiply and divide by root5-root3(rationalizing factor ))

2root7(root5-root3)/(root5+root3)(root5-root3)

as we know (a-b)(a+b)=a^2-b^2

2root7(root5-root3)/2        [5-3=2]

==root35-root21