CDS 2022 · PYQ · Algebra · medium
If squaring a positive real number x is same as adding 12, then what is x equal to?
Answer
The correct answer is A: 4. x² = x + 12, x² - x - 12 = 0, (x-4)(x+3) = 0, positive root x = 4.
- A.4✓ Correct
- B.2
- C.3
- D.5
x² = x + 12, x² - x - 12 = 0, (x-4)(x+3) = 0, positive root x = 4.
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