If x + y = 9 and xy = 16, find the value of x2 + y2.
113
49
65
97
Which of the following is a false statement ?
A + B = B + A
A.B = B.A
A / B = A .1/B
A - B = B - A
If x2 + 1/x2 = 27, find the value of x - 1/x
5
29
√29
57
1022 =
204
10404
10400
102
If 3 x + 2 y = 12, xy = 6 then the value of 9 x2 + 4 y2
- 72
72
- 74
- 76
(t - 3)2 - (t + 3)2 equals
2 t2 + 18
- 12 t
12 t
18
If (a x3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
(-3 x2) + (6 x2) + (-x2) + 4 x2 =
6 x2
14 x2
-6 x2
7 x2
(3 x - y) (9 x2 + 3 xy + y2)=
9 x2 + y2
27 x3 - y3
27 x3 + y3
x2 - y2
