If 4 p2 + q2 = 40 and pq = 6 find 2 p + q.
± 4
± 8
± 6
± 2
(-3 x2) + (6 x2) + (-x2) + 4 x2 =
6 x2
14 x2
-6 x2
7 x2
If (a x3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
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
(x + 3) (x2 - 3 x + 9)
x3 + 27
x3 – 27
x3 - 9 x + 27
x3 + 81
The degree of 5 x7 - 4 x3 + 2 x2 is
12
7
6
None of these
The value of expression 49 x2 - 84 xy + 36 y2, when x = 2 and y = 3 is
1600
160
16
1.6
If 3 x + 2 y = 12, xy = 6 then the value of 9 x2 + 4 y2
- 72
72
- 74
- 76
If x2 + 1/x2 = 27, find the value of x - 1/x
5
29
√29
57
If x = 1, y = -1 and z = -1 , find the value of x3 + y3 + z3 - 3 xyz.
- 4
2
0
