PYQPulse
HomeMocksPracticePYQsUpdatesDashboard
PYQPulse

Timing-accurate mock tests and PYQs for SSC, Banking and Railway exams — so the real paper feels like a revision.

Exams

  • SSC exams
  • Banking exams
  • Railway exams
  • All exams

Practice

  • Practice questions
  • Mock test series
  • Sectional tests
  • Year-wise PYQs
  • Performance analytics

Company

  • About us
  • Help Centre
  • Pricing
  • Sign in

Legal

  • Privacy Policy
  • Terms of Service

Contact

  • hello@testwala.co.in
  • Telegram
  • +91 62816 87760

Practice interface modeled on the official exam pattern — not the official examination. PYQPulse is not affiliated with the Staff Selection Commission, IBPS, SBI, RBI, NABARD, SEBI or Indian Railways.

© 2026 PYQPulse. All rights reserved.

Built for aspirants, by aspirants.

HomeMocksPracticeStats
  1. Home
  2. ›
  3. PYQs
  4. ›
  5. SSC CHSL
  6. ›
  7. 2020
  8. ›
  9. Q66

SSC CHSL 2020 · Question 66 of 91

Using algebraic identities, simplify the following expression. (x4 +x2 +1) (x2 +x+1) ​

Trigonometry

  1. A(x2 - x + 1)Correct
  2. B(x2 + x + 1)
  3. C(x2 - 2x + 1)
  4. D(x2 + 2x + 1)

Answer: A. (x2 - x + 1)

Explanation

Given: 4 2 ⇒ ? = (x +x +1) (x2 +x+1) ​ Formula: a 2- b 2= (a + b)(a - b) Calculation: ⇒ ? = (x 4+ 2x 2+ 1 - x 2)/(x 2+ x + 1) ⇒ ? = [(x 2+ 1) - x 2]/(x 2+ x + 1) ⇒ ? = [(x 2+ 1 - x)(x 2+ 1 + x)]/(x 2+ x + 1) ⇒ ? = x 2- x + 1 2 4 2 ∴ (x +x +1) (x2 +x+1) = x - x + 1 ​

Source: SSC CHSL 2020 (Tier-I) Prev. Year Paper (04-Aug-2021) (Shift 1) — prepp.in solved paper · reliable-secondary

← Q65View full paper (91 questions)Q67 →

Practice the full SSC CHSL 2020 paper

Timed test with all 91 questions, just like the real exam.

Start test