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
If x2 + y2 = 29, xy = 2 then the value of x4 + y4 =
831
833
834
835
If a - b = 10, ab = 21 then a2 + b2 =
144
146
142
140
The value of expression 49x2 - 84 xy + 36 y2, when x = 2 and y = 3 is
1600
160
16
1.6
(a + b)2 + (a - b)2 =
2 (a2 - b2)
2 (a2 + b2)
2 (2ab)
2 (- 2ab)
(t - 3)2 - (t + 3)2 equals
2 t2 + 18
-12 t
12 t
18
If x = 2/3, y = 3/4, then the value of 81x2 + 16y2 - 72xy is
81
27
9
3
If (ax3 + 2)2 = a2x6 + x3 + 4, then a =
1
1/2
4
1/4
If a + b = 8 and ab = 12 then a2 + b2 is
42
44
40
48
If 8x = 242 - 162 then the value of x is
