Sarkari RiseLogin
SSC CHSL 2020 · PYQ · Algebra · medium

If a + b = 11 and ab = 15, then a² + b² is equal to:

Answer

The correct answer is A: 91. a²+b² = (a+b)²−2ab = 11²−2×15 = 121−30 = 91.

  1. A.91✓ Correct
  2. B.90
  3. C.92
  4. D.93

Explanation

a²+b² = (a+b)²−2ab = 11²−2×15 = 121−30 = 91.
💡 Practice unlimited SSC CHSL PYQs + AI-tracked progress on each topic. Sign up free →

More Algebra questions

Want more SSC CHSL practice?

Free daily 10-Q quiz · adaptive mocks · 49,000+ practice questions (19,000+ verified PYQs) · AI doubt solver in Hindi + English

Sign up freeMore Algebra practice