Find the product (7 p - 8 q) (7 p - 8 q)
49 p2 - 30 pq + 64 q2
49 p2 - 112 pq + 64 q2
49 p2 - 112 pq - 64 q2
49 p2 + 30 pq + 64 q2
The value of expression 49x2 - 84 xy + 36 y2, when x = 2 and y = 3 is
1600
160
16
1.6
If x + y = 9 and xy = 16, find the value of x2 + y2.
113
49
65
97
If x2 + 1/x2 = 27, find the value of x - 1/x
5
29
√29
57
If a + b = 8 and ab = 12 then a2 + b2 is
42
44
40
48
(t - 3)2 - (t + 3)2 equals
2 t2 + 18
-12 t
12 t
18
If a - b = 10, ab = 21 then a2 + b2 =
144
146
142
140
If 2p + 3q = 14, 2p - 3q = 2 then value of pq is
- 8
1/8
- 1/8
8
6.3
6
3.2
4.6
3 3/4
4 3/4
3 1/4
3 1/2
