Could somone help me to solve this problem?

Yes, some helper here can help you but it really does require you to inform us what you need help with.

Why not try letting f(x) = ax^3 + bx^2 + cx + d. Divide that by x^2 - 4 and let the remainder = 2x-5. This will possible yield what some values for a, b, c and d. Do the same with dividing by x^2 + x + 3.

Post back showing your work.
 
Yes, some helper here can help you but it really does require you to inform us what you need help with.

Why not try letting f(x) = ax^3 + bx^2 + cx + d. Divide that by x^2 - 4 and let the remainder = 2x-5. This will possible yield what some values for a, b, c and d. Do the same with dividing by x^2 + x + 3.

Post back showing your work.
Thank you very much
 
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