Question

root 7+9/root 7-9 rationalise the denominator​

Answer 1

Answer:2 root 2

Step-by-step explanation:

root 7+9/root 7-9 = root 16/root 2

=4/root 2

=4*root2/root2 *root 2

= 4root 2/2

= 2root 2

Answer 2

Step-by-step explanation:

so atq,root 7+9/root 7-9

so,(root 7+9/root 7-9 )×(root 7 +9/root 7+9)

so we know root x ^2 =x

hence 7+(2×root 7×root 9)+9/7-9

we know root 9 = 3

so,16+18root7/-2=-16-17root7/2