Q8 of 116 Page 6

If =3, find the values of and.

(i) Given that,

x - = 3


Squaring both sides, we get


(x - )2 = (3)2


x2 - 2 × x × + ()2 = 9


x2 - 2 + = 9


x2 + = 11


(ii) Squaring both sides, we get


(x2 + )2 = (11)2


(x2)2 + 2 × x2 × + ()2 = 121


x4 + 2 + = 121


x4 + = 119


More from this chapter

All 116 →
6

Find the value of x, if:

(i)


(ii)


(iii)

7

If =20, find the value of .

 9

If = 18, find the values of and.

 10

If x+y = 4 and xy=2, find the value of x2+y2