If 4 p2 + q2 = 40 and pq = 6 find 2 p + q.
± 4
± 8
± 6
± 2
If x + y = 9 and xy = 16, find the value of x2 + y2.
113
49
65
97
If (a x3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
The degree of 5 x7 - 4 x3 + 2 x2 is
12
7
6
None of these
1022 =
204
10404
10400
102
If x = 1, y = -1 and z = -1 , find the value of x3 + y3 + z3 - 3 xyz.
- 4
2
0
16
The value of expression 49 x2 - 84 xy + 36 y2, when x = 2 and y = 3 is
1600
160
1.6
If x2 + 1/x2 = 27, find the value of x - 1/x
5
29
√29
57
(t - 3)2 - (t + 3)2 equals
2 t2 + 18
- 12 t
12 t
18
