Sarkari RiseLogin
SSC CHSL 2025 · PYQ · Algebra · medium

What is the value of a² + b² + c² if a + b + c = 12 and ab + bc + ca = 40?

  1. A.44
  2. B.64✓ Correct
  3. C.144
  4. D.84

Explanation

(a+b+c)² = a²+b²+c² + 2(ab+bc+ca). So 144 = a²+b²+c² + 80. Therefore a²+b²+c² = 64.
💡 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 · 4,000+ verified PYQs · AI doubt solver in Hindi + English

Sign up freeMore Algebra practice