Question

rationalising factor of the denominator of 7/root3 + root2 is ?
Options
a. Root 3 + root 2
b. -7
c. root 3 - root 2
d. 49
Which one is the right option ?

Answer 1

Answer:

option C

Step-by-step explanation:

For this you need to learn rationalisation. means when we are doing rationalisation we will change the sign between two terms in denominator. like+ to- and - to+.

7/√3+√2

we will multiply it by √3-√2

7/√3+√2*√3-√2/√3-√2

= 7√3-7√2/1

No matter that what the numerator is only our denominator should be a a rational number