Question: How could i calculate the following equation in Maple

when i calculate the equation as:

solve({g*(w-c)+(1/4)*(a-g*w+g*r)^2/(b*(p-k))-(a-g*w+2*g*r)(a-g*w+g*r)/(2*b*(p-k)) = 0}, {r})

i got the message "Warning, solutions may have been lost" without any feedback,

does the equ too complex to calculate in Maple? or i make some mistakes?

how should i do to solve this equation~

ths

 

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