CBSE · Class 6–12
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Q2
3/5- Let the speed be x and form 360/x − 360/(x + 5) = 12/2
- Simplify to the quadratic x² + 5x − 1800 = 01/1
- Solve the factorisation: x = −45 or x = 400/1
- Reject the negative root and state 40 km/h with units0/1
Your diagnosis · Mathematics
Well set up. Recheck the signs in your roots.
Equation set up correctly Check the signs of each root
- Forming a quadraticMastered
- Solving by factorisationNeeds focus
- Nature of rootsDeveloping
Practice
Practise your mistakes.
Solve x² − 3x − 28 = 0 by factorisation.
Two consecutive integers multiply to 306. Find them.
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MathematicsScienceSocial ScienceClass 11–12: Science, Commerce, Humanities + electivesClass 6–12
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