1.

Please solve it. it is the ouestion of 9 class topic number system in exponents

Answer»

Rationalise the following no.

ROOT 11 - root 7/ root 11 + root 7
root 11 - root 7/ root 11 + root 7 * root 11 - root 7/ root 11 -root 7

(root 11- root7) whole square / root 11 square - root 7 square

11+7 - 2 root 77 / 11-7 = 18-2root77/4 = 18/4 - 2root77/4

= 9/2 - root77 /2 = a - b root 77

Therefore a = 9/2 ,

 -broot 77 = -root77/2.
that is equal too 1/2


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