Question
If X + Y = 23 and XY = 126, what is the value of (X)² +
(Y)² ?Solution
ATQ,
Given: X+Y=23 XY=126 Use the identity: 
Substitute: 
More No. System Questions
73920, 9240, ?, 220, 44, 11
3601 3602 1803 604 154 36
...98    219    75    244    ?    273
2, 17, 147, 1167, 8157, 48957
41 48 89 137 226 ?
...There are three series given below which are following with the same pattern.
Series I: 21, 44, 135, 544, 2725
Series II: 14, B, C, D, E
17Â Â Â Â Â ? Â Â Â Â Â 2142 Â Â Â Â Â Â 12852 Â Â Â Â Â Â 64260Â Â Â Â Â Â 257040
...95 186 376 748 1500 ?
...5 ? 205 823 7405 29623
...32, 128, ?, 2048, 8192, 32768
Relevant for Exams:
