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# Second Order Differential (further maths) Watch

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1. Hi Guys, I need help on question 3. May i know how to reduce the differential equation?
2. differentiate z = y3 with respect to x

the first derivative will enable you to find an expression for dy/dx

the second derivate will enable you to find an expression for d2y/dx2

work with these to get the result they ask for.
3. (Original post by marcuskhoo)
Hi Guys, I need help on question 3. May i know how to reduce the differential equation?
Differentiate twice with respect to x. Use these results to substitute everything in the first equation involving y into something in terms of z and x.
4. (Original post by marcuskhoo)
Hi Guys, I need help on question 3. May i know how to reduce the differential equation?

and proceed with substitutions
5. (Original post by RDKGames)

and proceed with substitutions

Hey bro, its you again. Thanks man, instead of doing second derivative in terms of dz/dx, I did dy/dx which is a longer method and i did mistakes there too... thanks for your help!

Cheers and good day ahead.

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