(a + b)2 + (a - b)2 =
2 (a2 - b2)
2 (a2 + b2)
2 (2ab)
2 (- 2ab)
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
(t - 3)2 - (t + 3)2 equals
2 t2 + 18
- 12 t
12 t
18
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
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
If x2 + 1/x2 = 27, find the value of x - 1/x
5
29
√29
57
If (a x3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
