Question

13. If x = 9-475, find the value of x² +
1
2
X х
5-
21​

Answer 1

Answer:

We have,

x=9+4

5

so,

x

=

9+4

5

=

(

5

+

4

+2

(5×4)

)

=

(

5

+

4

)

2

=

5

+2

Now,

x

1

=

=

5

+2

1

By rationalizing then we get

x

1

=

5

−2

Thus

A/Q

x

−

x

1

=

5

+2−

5

−2

=4

This is the required solution.