TalentJR apps
Identities like (a + b)² = a² + 2ab + b² turn hard-looking questions into one line of working. They also square numbers near 100 in your head. For a quadratic x² − Sx + P = 0, the roots add up to S and multiply to P — which is also how you factorise it.
✓ You passed this topic’s test.
Use the identity, skip the guessing — “a + b and ab are enough to find a² + b²”
Use it for: Algebra, identity, quick-squaring and quadratic equation questions in Class 8–10 Olympiad papers.
Check: a = 4 and b = 5 fit (4 + 5 = 9, 4 × 5 = 20), and 16 + 25 = 41 ✓
Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🎓 Identity Ace badge when you pass — and a certificate when you finish all 13 topics of Part 4 · Class 5–10 problem solving. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.