(3 x - y) (9 x2 + 3 xy + y2)=
9 x2 + y2
27 x3 - y3
27 x3 + y3
x2 - y2
(-3 x2) + (6 x2) + (-x2) + 4 x2 =
6 x2
14 x2
-6 x2
7 x2
If 4 p2 + q2 = 40 and pq = 6 find 2 p + q.
± 4
± 8
± 6
± 2
(a + b)2 + (a - b)2 =
2 (a2 - b2)
2 (a2 + b2)
2 (2ab)
2 (- 2ab)
If (a x3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
If x + y = 9 and xy = 16, find the value of x2 + y2.
113
49
65
97
If x = 1, y = -1 and z = -1 , find the value of x3 + y3 + z3 - 3 xyz.
- 4
2
0
16
If A = x2 - 2 x - 5, then the additive inverse of A is
-5 - 2 x + x2
x2 + 2 x + 5
-x2 - 2 x + 5
-x2 + 2 x + 5
If x = 5/4 then the value of 16 x2 + 24 x + 9 is
68
64
81
