Finding finite element soluton for a PDE

get2kool
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Find the Finite element solution for a equation:
(∂^2 u)/〖∂x〗^(2 ) +(∂^2 u)/〖∂y〗^2 +λu-c=0
using linear triangular finite elememts.
In the above equation u is scalar,λ is a constant and is a body force term(constant).

The boundary conditons are in terms of prescribed values of the function u or zero flux.
 
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Have you made any attempt yourself? What exactly is meant by "linear triangular finite elements"?
 
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