How to factor 5a^4 + 12a^3 + 4a^2

Which quadratic function best fits this data? x y 1 32 2 78 3 178 4 326 5 390 6 337 a. y=11.41x2+154.42x−143.9 b. y=−11.41x2+154.42x−143.9 c. y=11.41x2+154.42x+143.9 d. y=−11.41x2+154.42x+143.9

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

If point cis between points a and b, then ac + — = ab