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Special Cases
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This lesson deals with some special types of questions. These questions often confuse the students in the exam. This lesson tells the ways to master these types of questions.

Abhishek Kumar
UPSC Aspirant| Cleared SBI PO| Cleared BOB PO| NDA, AFCAT exam| Attended SSB thrice| Cracked SSC CHSL| Worked as Software engineer IBM

U
Unacademy user
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sir ye jo distance ka formula h isse complete distance aa rha h ya fir bas ek side ka distance? school wale question main agr complete distance traveled by boy hota to bhi yhi formula lgega kya or answer Ko double kr denge kya?
Abhishek Pandey
a year ago
answer double
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Manishachauhan
a year ago
sir 4th question main ...total distance nikalna h...or question 5th main bas ek side ka distance nikalna h fir bhi whi same formula use Kiya...aisa Kyun???
Abhishek Pandey
a year ago
ek side ka nikal kr double kr do method same rhegi
M
Manishachauhan
a year ago
fir aapne 4th question main double Kyun nhi kiya?
M
Manishachauhan
a year ago
4th question main total distance nikalna tha...fir bhi double nhi Kiya ..bas as it is formula lga diya...yeh doubt h
Sir if both options comes CND & no relation then? Which one we should opt?
brief and nicely explained. must watch by all. way to go.
many many thanks ...... providing such an unbelievable method....really it ll help me in SBI po...please sir send such a valuable and time consuming methods....
  1. Quadratic equation Presented by: Abhishek Kumar


  2. About me: Cleared Bank Of Baroda PO Cleared SSC CHSL Cracked NDA,AFCAT exam Attended SSB thrice Currently working in IBM India Follow me: https://unacademy.com/userlAbhishek_kr Contribute


  3. Special Cases: Type:1 SQUARES X2 = 1600 y2 = 1600 Answer is CND. Because, a square would always mean possibility of a positive as well as negative value, x = 40,-40 y = 40.40 Hence, any 2 squares or their variations are always CND, irrespective of the values.


  4. Example:2 X2-243 = 468 y: + 513 = 1023 Don't touch the pen. Its a CND. Because, ultimately we'll get a perfect/ imperfect square, which is always a CND


  5. e. EQUATIONS Example:5x 4y 92 4x+2y = 64 Soln: 8x+4y = 128. 8x + 4y = 128 5x + 4y = 92 3x = 36 X=12 y=8 So, X > Y is right here.


  6. Type 3: Involving roots QF-N3x-54 = 0; y2+2y-24 = 0


  7. QF-7V3x-54 = 0; y2 +y2y-24 = 0 5 -94 2J3 2


  8. 2 22 4-


  9. Q.x?_7V3x-54 = 0; y2+2y-24 = 0 2 2 2 5 2 4- "Y2+ 127-302 7-2420


  10. Q.x?_7V3x-54 = 0; y2+2y-24 = 0 2 2 2 5 2 4- "Y2+ 127-302 7-2420 CND