GATE Civil Engineering (CE) 2016 Shift 1 Solved Paper

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Question : 12 of 65
 
Marks: +1, -0
The type of partial differential equation ∂2P∂x2+∂2P∂y2+3∂2P∂x∂y+2∂P∂x−∂P∂y=0 is 
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