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- a)ab = cd
- b)ad = bc
- c)ad = √bc
- d)ab = √cd
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
a)ab = cdb)ad = bcc)ad = √bcd)ab = √cdCorrect answer is op...
Solve this by assuming each option to be true and then check whether the given expression has equal roots for the option under check.
Thus, if we check for option (b). ad = be.
We assume a = 6, d = 4 b = 12 c = 2 (any set o f values that satisfies ad = bc).
Then (a2 + b2) x2 - 2(ac + bc) x + (c2 + d2) = 0
We assume a = 6, d = 4 b = 12 c = 2 (any set o f values that satisfies ad = bc).
Then (a2 + b2) x2 - 2(ac + bc) x + (c2 + d2) = 0
180 x2- 120 x +20 = 0.
We can see that this has equal roots. Thus, option (b) is a possible answer. The same way if we check for a, e and d we see that none of them gives us equal roots and can be rejected.
We can see that this has equal roots. Thus, option (b) is a possible answer. The same way if we check for a, e and d we see that none of them gives us equal roots and can be rejected.
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a)ab = cdb)ad = bcc)ad = √bcd)ab = √cdCorrect answer is option 'B'. Can you explain this answer?
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