Can someone double check me please? I'm not sure if it matters that the fourth and first orders are missing.(adsbygoogle = window.adsbygoogle || []).push({});

Reduce to a first-order equation:

2y''''' + 12x^3y''' - 2y^7y'' - 8y = 0

My solution:

u1' = u2

u2' = u3

u3' = u4

u4' = u5

u5' = -6x^3(u4) + y^7(u3) + 4(u1)

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# Reducing to First-Order Equation

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